Serial Killers, DNA Secrets & Writing Thrillers That Keep You Up All Night | April Henry Interview
Plot Twist RadioApril 13, 2026x
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Serial Killers, DNA Secrets & Writing Thrillers That Keep You Up All Night | April Henry Interview

In this episode of Plot Twist Radio, Erin sits down with April Henry, New York Times bestselling author of over 30 gripping mysteries and thrillers, to dive into the dark—and fascinating—world behind her stories.

From a childhood letter to Roald Dahl that helped launch her career, to her latest novel In the Blood, April shares how she crafts fast-paced, suspenseful stories that keep readers hooked until the very last page.

We explore:

  • The terrifying “what if” behind In the Blood—discovering your father is a serial killer
  • How genetic genealogy and real-life cases inspire fiction
  • The key differences between YA thrillers and adult suspense
  • Her signature techniques for building tension and cliffhangers
  • Why persistence—not talent—is the real secret to success in writing

If you love true crime, psychological thrillers, mystery novels, or behind-the-scenes writing insights, this episode is for you.


Where to find April: https://www.aprilhenry.com/


🎙️ Follow Plot Twist Radio for more conversations with authors, creators, and storytellers who know how to deliver the ultimate plot twist.





00:00:00
Welcome to Plot Twist Radio, the show where creativity,

00:00:03
storytelling, and the unpredictable path of the

00:00:05
creative life all collide. I'm your host, Aaron Egnatz.

00:00:11
Today on Plot Twist Radio, I'm sitting down with a master of

00:00:14
suspense, April Henry, a New York Times bestselling author

00:00:18
known for her fast-paced, edge of your seat thrillers that keep

00:00:21
readers guessing until the very last page.

00:00:23
With over 30 books to her name, April has written everything

00:00:26
from gripping adult mysteries to wildly popular young adult

00:00:29
thrillers, And her latest novel, In the Blood, might just be her

00:00:33
most chilling yet. Imagine discovering your

00:00:35
biological father is a serial killer.

00:00:38
Yeah, we go there. In this episode, we talk about

00:00:41
why she's a self-proclaimed plotter and how she builds

00:00:44
tension so effectively that just one more chapter becomes

00:00:48
impossible to resist. If you've loved thrillers, true

00:00:51
crime, or the psychology behind what makes a story

00:00:53
unforgettable, this one's for you.

00:01:00
April, welcome to the show. Thank you so much for having.

00:01:03
Me. Can you tell the audience a

00:01:05
little bit about yourself? I'm April Henry, I live in

00:01:07
Portland, and my book In the Blood will come out May 12th.

00:01:12
I got my start in writing when I was in elementary school and I

00:01:17
sent Roald Dahl, the guy who wrote Charlie and the Chocolate

00:01:20
Factory. I sent him a short story and he

00:01:23
not only sent me back a postcard telling me how much he liked it,

00:01:26
he actually showed it to his editor and she had a children's

00:01:30
magazine and she asked if she could publish it.

00:01:32
So he helped me get my start in writing.

00:01:35
Now that is an interesting story.

00:01:37
I mean, he's one of the best. So you've written both adult

00:01:40
mysteries and a large number of young adult thrillers originally

00:01:45
drew you to the mystery and suspense genre.

00:01:48
I had written three books that hadn't gotten picked up and my

00:01:52
4th book, my agent said I'm going to position this as a

00:01:55
mystery. I'm going to try and sell it as

00:01:57
a mystery. And I was like, you can try and

00:01:59
sell it as a cookbook. I don't care.

00:02:02
I just want to sale. Luckily she had given me a heads

00:02:04
up that if I, if it did sell, it would probably be a two book

00:02:08
deal because that's what happened.

00:02:10
And it gave me like it sold in two days to the first publisher

00:02:14
who saw it. So I luckily spent those two

00:02:17
days thinking about what wouldn't my next book be about

00:02:19
about. And then they made me this to

00:02:21
book offer. And it turns out mysteries and

00:02:25
thrillers is a huge playground. I mean, you can do romance,

00:02:29
horror can be narrated by a cat, humor.

00:02:32
It can be a wide range of things.

00:02:35
You can have Paranormals, it turns out.

00:02:37
It was a good fit for me. I like the high stakes, but I

00:02:40
also like there's flexibility. Do different things with it.

00:02:43
Yes, for sure. It's one of my favorite genres

00:02:46
to read. I don't really write in it, but

00:02:48
I love to read it, you know? I love the fast-paced and keep

00:02:51
you on the edge of your seat. That is my thing.

00:02:53
So your books are, like I said, incredibly fast-paced and

00:02:56
gripping. When you start a new story, do

00:02:58
you begin with a specific tour mystery in mind, or does the

00:03:02
idea usually start with a character?

00:03:05
For me, it's usually the plot comes first.

00:03:07
I heard the lady who wrote God of the Woods, Liz Moore, said

00:03:11
that people start with one of the three.

00:03:12
PS plot person or place. She starts with place, I start

00:03:17
with plot. So for In the Blood, I was like,

00:03:21
I've done some genetic genealogy and found a few mysteries.

00:03:25
It was back enough that it didn't really affect me to know

00:03:28
that my mom's cousin had an affair or something.

00:03:31
So. But I was like, what if there

00:03:32
was a girl who was adopted and she gets very curious about who

00:03:37
her adoptive parents are. She has an early birthday, she

00:03:39
gets an ancestry kit and tests and has a real hard time finding

00:03:44
out, figuring out her parents and puts her DNA on Jed Match to

00:03:48
see if she can find someone else.

00:03:49
And that police are very excited because she matches a serial

00:03:53
killer they've been trying to find called the Portland

00:03:55
Phantom. So then I had to decide what was

00:03:58
her family like? I had to figure out how how she

00:04:03
would go about doing it. I reached out to a lot of

00:04:07
experts in genetic genealogy and just genetics in general.

00:04:11
It turns out everything I learned a million years ago is

00:04:13
not true anymore, or we understand it a little better.

00:04:17
I just did a ton of research, but for me, it started with that

00:04:20
plot. What would happen if you found

00:04:22
out your father was a serial killer and thinking about nature

00:04:26
versus nurture. Are you your father's child?

00:04:29
I mean, how much does he, how much say does he have and who

00:04:31
you are if you weren't raised? Interesting.

00:04:34
So you've written, like I said, young adult and adult.

00:04:38
Young adult suspense is very compelling, but how is it

00:04:42
compared to adult thrillers? You know What is the compare and

00:04:45
contrast there? I would say that and especially

00:04:48
in today's world, not necessarily I wouldn't

00:04:51
necessarily support it, but and there's a lot of parents who are

00:04:55
looking to object to a book. And so you have to think about

00:04:59
you're going to have are going to have swears you're going to

00:05:01
have sex or how actually odd thing, no one protests about

00:05:04
violence. But I always think what's

00:05:06
appropriate for my age level, even gay characters might get

00:05:09
you kicked out of a certain state or something where they're

00:05:12
like, oh, we can't have our children reading about a gay

00:05:14
character. So that stuff is not things you

00:05:17
have to think about writing for adults.

00:05:19
And then you also need to remember your teens have to

00:05:22
solve the problem. It can't be the adult, so it

00:05:25
can't be a parent or a teacher. It has to be them.

00:05:27
So that's why a lot of times in teen literature you will see

00:05:31
parents who are divorced, drunk, drug addicted, just really busy

00:05:38
so they can't notice what their teen is doing.

00:05:40
Because if they did notice, they'd probably step in and try

00:05:42
and change what the teen is doing.

00:05:44
So unique. A somewhat absentee parent in YA

00:05:47
books if you want the characters to get up to something they

00:05:50
shouldn't be doing. Yes, yes, my daughter just

00:05:54
pulled me into Stranger Things. I had not watched it until

00:05:57
recently and I started watching it and I was thinking how are

00:06:00
these kids like out and about and these parents don't even

00:06:02
realize. Well, I didn't wait.

00:06:04
I was set in the 80s. And so there I wasn't.

00:06:07
I was more a child of the 70s. You could, you know, you're just

00:06:10
gone all this time you didn't have a cell phone half the time

00:06:13
your parents didn't know where you were.

00:06:14
And there was, you know, there was a lot of bad things that

00:06:18
could have happened, but you were maybe more oblivious to

00:06:21
him. There wasn't a 24 hour news

00:06:22
cycle where like if a girl gets kidnapped in Arkansas and I'm in

00:06:27
Oregon, it's still going to be maybe on my local news because

00:06:30
they have video of it happening and it's going to make a feel

00:06:32
like it happened here. That is a good point.

00:06:34
Yeah. I I was born in the 80s, but I

00:06:36
grew up in the 90s. So I I still remember that, you

00:06:40
know, the kind of footloose and fancy free.

00:06:42
But as a parent of today, I think I'm pretty like strict.

00:06:45
Where's that goes? And it probably has a lot to do

00:06:47
with what we all see, you know, social media.

00:06:50
So how do you build tension in your writings in a way that

00:06:54
keeps readers turning the page? Well, I always think about

00:06:57
sometimes it's just mechanical things.

00:06:59
Like if you're reading a book at night and then and you page

00:07:02
ahead thinking you're going to go to bed at the end of the

00:07:04
chapter and there's fifty more pages, you're just going to go

00:07:06
to bed right then. But if you have shorter chalkers

00:07:09
and it ends in three pages and it ends on some kind of a

00:07:12
cliffhanger, then you are going to keep on reading.

00:07:15
And it's gratifying for you as a reader too, because it feels

00:07:18
like, man, this book is reading so fast.

00:07:20
So having those short chapters, the cliffhangers, if you have

00:07:24
multiple points of view, you can cut back and forth.

00:07:27
So like, chapter 1 might end with character A, you know,

00:07:31
getting a phone call and freaking out, but you don't know

00:07:34
what it's about. And then chapter B or chapter 2

00:07:38
is that B character opening the door and or there's a gunshot

00:07:42
and then you cut away at that moment.

00:07:43
And you by cutting between the points of view, it gives the

00:07:47
reader always something they're worrying about, wondering about

00:07:50
wanting to see resolved. And of course you don't resolve

00:07:52
things for them now that easily. Right, yes.

00:07:56
So do you consider yourself more of a plotter or a pantser like

00:08:00
me? I just fly by the seat of my

00:08:02
pants and we just see where it ends up.

00:08:04
But a lot of people I talked to are more plotters and outliners.

00:08:07
I'm a plotzer, so it's like a pantser and a plotter, I

00:08:11
thought, but you know, your best ideas are not going to come up

00:08:14
all in those, you know, month or so that you're plotting.

00:08:17
So you're going to have better ideas.

00:08:19
And sometimes I have found that like I plotted out a character

00:08:22
was going to crawl up into an acoustical tile ceiling.

00:08:26
I always try and research things.

00:08:27
So I researched how much weight in acoustical tile ceiling can

00:08:31
hold. They only can hold like 50 lbs,

00:08:33
but I made a really thin and they said if you put some kind

00:08:36
something across two of them, she could be up there.

00:08:38
I did all this stuff and I got her on top of a table and

00:08:42
someone was going to boost her up.

00:08:43
And then I realized the character would just wouldn't do

00:08:45
it. So sometimes your plotting is

00:08:48
still going to fall apart when it comes to doing the writing.

00:08:51
But I do try and plot. I feel like it makes me a faster

00:08:54
writer now if I'm you're writing a thriller as opposed to a

00:08:57
mystery where you're trying to solve whodunnit or something

00:09:00
like that. If it's a thriller, you have a

00:09:02
girl who wakes up in the trunk of a car and she doesn't know

00:09:05
her own name and she's in handcuffs.

00:09:07
You don't necessarily need to plot, you can just have her keep

00:09:10
trying to escape and it's not working.

00:09:12
So I've done in both ways. For sure, though, mysteries

00:09:15
require careful planning, so the clues feel fair, but the twist

00:09:20
still surprises readers. How do you balance giving

00:09:24
readers hints without revealing too much too early?

00:09:28
Well, I feel like you you need to have at least three good

00:09:31
clues. And I also think I think a lot

00:09:33
of things work with threes. You need 3 viable suspects and

00:09:36
three good clues for when the murder is revealed.

00:09:39
But you kind of hide him. Like if somebody's you're going

00:09:42
through the victim's purse and there's, I don't know, a

00:09:44
matchbook from a hotel or they probably don't have those

00:09:46
anymore. Or there's a receipt for

00:09:48
lingerie or and there's a candy. Maybe it's the candy is actually

00:09:53
the big point. But so it's there, but no

00:09:56
attention is paid to it. In the book, the character, he's

00:09:59
trying to figure out things out. The detective doesn't pay

00:10:01
attention to it, but it's still there.

00:10:03
You should still be able to go back and see the clues.

00:10:05
I just finished reading Mary Ku because it's not her and that

00:10:11
book had a very small cast, yet she made every single person be

00:10:14
a potential suspect and I really like the solution.

00:10:18
A lot of times I'm picky, I don't like the solution, but I

00:10:20
was like, no, that works, that's believable.

00:10:24
It's very satisfying to read 1 where I don't pick it apart in

00:10:26
my head. So your novel When We Go

00:10:29
Missing, and it sounds incredibly intriguing, but what

00:10:33
was the spark that inspired that story?

00:10:36
It was just thinking about like what if there was a surprise

00:10:39
when I first started doing genetic genealogy just for my

00:10:42
own family, someone warned me, they said what if there was a,

00:10:45
they call it NPE, a non paternity event.

00:10:47
And I was like, well, we all look like our parents, both me

00:10:51
and my brother and sister. So if there was some a non

00:10:53
paternity event, it would be a generation back.

00:10:56
And at that point, it's just interesting and I, I wanted to

00:11:00
play around with, you know, a character who is really

00:11:03
wondering what does this mean about me if she finds out

00:11:05
something terrible. I read and there's quite a few

00:11:08
daughters of serial killers who've written memoirs.

00:11:11
So I read that BTK Killer's daughter has a memoir.

00:11:16
There's a more local killer named the Happy Face Killer

00:11:20
because he would sign his notes with happy faces.

00:11:23
He, his daughter wrote a memoir. So I was just, I wanted to

00:11:28
explore that. And then there was a local

00:11:30
killer here a long time ago. Diane Downs said that she had

00:11:35
been assaulted by a guy who shot her and her children, and one or

00:11:41
two of her children died. But it turned out she had just

00:11:43
done it herself. And then she got pregnant and

00:11:48
the baby was taken away after she had the baby in prison.

00:11:51
And her daughter figured out as a teen that that was her mother.

00:11:54
And it spent sent her into a tailspin.

00:11:57
It was like, who am I if my mother is so evil that she can

00:12:01
kill her own children? So I wanted to play with how

00:12:04
would the emotions be and how would you feel about yourself

00:12:08
and how would you come to terms with this fact?

00:12:10
Interesting. That's a lot of research, but

00:12:13
you know, that's one of the most interesting topics.

00:12:15
My husband always gives me like these weird looks, but I'm

00:12:18
always watching the ID channel because it's so fascinating.

00:12:22
It's so fascinating to kind of get into that mindset and

00:12:26
explore what is wrong with these people.

00:12:28
When you are doing this, when you're writing, does it ever

00:12:32
feel really heavy? You know the these dark plots.

00:12:35
Most of the time not. There's one fact someone told me

00:12:40
one time when I was doing research about a real case.

00:12:43
I really wish he had not told me, but luckily I've mostly

00:12:46
forgotten it and there was one photo I saw in a homicide

00:12:49
textbook of a woman and that one for some reason super creeped me

00:12:55
out. But most of the time I can look

00:12:57
at like you can find almost anything online, including like

00:13:01
autopsy photos. When I had a book one time where

00:13:03
I wondered if a different shaped knife would make a different

00:13:06
wound and they had taken all these pictures maybe just

00:13:09
because they were only of the wound.

00:13:11
But I was at a coffee shop angling my computer away from

00:13:14
everybody and drinking a lot of latte and not, not really, you

00:13:19
know, upset by it. I probably make a decent doctor

00:13:22
because I don't get super freaked out by blood or anything

00:13:25
like that. Yes, it sounds like you would.

00:13:27
So your new book that's coming out in the blood, can you give

00:13:31
us a little teaser about it without, you know, giving

00:13:33
anything away? Well, you kind of know from the

00:13:36
beginning that the bad guy is working at her father is working

00:13:40
as a security officer. So there are some that there are

00:13:45
some chapters from his point of view and then her point of view,

00:13:49
and then a rookie cop who finds the latest victim.

00:13:53
And I decided to do something that I don't know if any real

00:13:56
killer has ever done, but I decided that the serial killer

00:14:00
would leave an item from the previous victim on the next

00:14:04
victim. So it's kind of like his calling

00:14:06
card. So it might be a photo, it might

00:14:10
be an earring. Originally it was a little

00:14:12
necklace with the initial D on it that was found on the neck of

00:14:17
a woman named Candace. So I tried to think about what

00:14:21
what he would be like and how he would go about concealing.

00:14:25
And it's true that there are there are cops of people.

00:14:28
He's works adjacent, he's in a security officer for college.

00:14:33
But there are cops who are bad guys.

00:14:35
And they're probably some of the best bad guys because they know

00:14:38
about how evidence is collected. So this guy gets clothes from

00:14:42
Goodwill and wears them and even gets shoes that are different

00:14:46
from his and just is very careful not to leave any

00:14:49
evidence behind. There was a guy who was had

00:14:53
raped a lot of women, I think in Ohio, and it turned out he was a

00:14:56
cop. He would and he was not leaving

00:14:58
evidence behind. So sometimes cops make the best

00:15:01
criminals. I could see that, yes, and I'm

00:15:04
trying to think back. I heard about one recently and

00:15:07
he was a cop and he got away with it for the longest time and

00:15:12
it happened to be, I think it was his daughter.

00:15:15
Going back to what you were talking about earlier, that

00:15:17
turned to Mint. And state Killer was a cop.

00:15:20
Maybe that's the one. He was doing it and they that

00:15:23
one was a weird one. Where it was genetic genealogy

00:15:26
that caught him and and there had been so much speculation

00:15:30
about who he was and that guy was never on anyone's radar that

00:15:34
he was the killer. That's got to be the one I was

00:15:36
thinking of because I knew it was a famous one, but I was just

00:15:39
drawing a blank. I don't know, my brains not

00:15:41
working today. So you're a New York Times

00:15:44
bestselling author. You've won major awards.

00:15:47
When you look back at the beginning of your writing

00:15:50
career, what advice would you give your younger self?

00:15:53
I would say, I mean, I guess I kind of did it the right way

00:15:58
that I was always hopeful, but it wasn't.

00:16:01
I didn't get an agent. My first book got like 107

00:16:05
rejection letters. My second book got 53 and I

00:16:09
could have given up then, but the 54th person who saw it

00:16:12
wanted to be my agent. She sent that book out to

00:16:15
editors who got nice rejection letters but no sale.

00:16:18
The third book didn't even get nice rejection letters.

00:16:20
And like I said, that 4th book sold in two days.

00:16:23
So it would be just not to give up.

00:16:25
The people who continue to write, who work on their

00:16:28
writing, who think about what they're reading and why it works

00:16:31
or why it doesn't work, those are the ones who get published.

00:16:33
It just being really stubborn and trying to believe in

00:16:36
yourself and it could be hard. I got 1 rejection letter back

00:16:39
when they used to be on paper, I'd sent it to this really

00:16:42
famous agent and I was really excited and most, most of the

00:16:45
time they would send you back a rejection on in their own

00:16:49
letterhead. But he just took my letter and

00:16:52
he crossed it out with a big black sharpie and he wrote no in

00:16:56
like 6 inch hive letters. And I could have like been

00:16:59
crushed and just stopped, but I kept going.

00:17:03
And so that I it's not much of A secret to be stubborn and to

00:17:07
persevere, but I, I think it is the secret to almost anything.

00:17:11
Keep at something, you'll get better.

00:17:13
I'm, I mean, I'm like, and I'm a blue belt in jiu jitsu and I had

00:17:17
not strong. I'm not, I've got bad knees and

00:17:20
a bad hip. And, but it's kind of an

00:17:22
accomplishment to be a blue belt And it's only because I just

00:17:24
kept showing up and working at it.

00:17:26
That's the only reason I got better.

00:17:29
I would have got that Letterman. I mean, it was depressing.

00:17:33
I could. Imagine.

00:17:34
I mean it could crush you. I hate that process.

00:17:37
That's the worst process I've come across when it comes to

00:17:40
writing. More so than the editing

00:17:42
feedback or anything, just the query in it.

00:17:45
Well, now a lot of times people will say no.

00:17:48
If you don't hear from them, it's a no.

00:17:49
But then you keep thinking, well, did they get it?

00:17:52
Did they even read it? You know, maybe if they haven't

00:17:54
said no, that means they're thinking about it.

00:17:56
And I feel like at least back then you would, you would get,

00:17:59
you would get a letter, you would get something back.

00:18:02
I mean you had to provide the self addressed stamped envelope,

00:18:06
but you at least got something back.

00:18:07
Right, yes. So looking ahead, are there any

00:18:11
new projects after your newest release?

00:18:14
Yes, I have a third book. Girl Stolen was my best selling

00:18:17
book. It's sold like half a million

00:18:19
copies. There's a second book to it and

00:18:21
I turned in a third book around Christmas and I think it's going

00:18:24
to be called Dig Another Grave. So it's about a blind girl who

00:18:27
goes for a hike and and they run across somebody burying a body.

00:18:32
So then they're on the run and she's blind.

00:18:36
Wow, that sounds really intriguing.

00:18:38
Where can the listeners find you?

00:18:40
Aprilhenry.com. I also am on every single stupid

00:18:45
social media site. I'm on Instagram, TikTok, twice.

00:18:50
I have one for writers and then just one about me and my books.

00:18:54
I'm on Facebook. I'm on Blue Sky, I'm on Threads

00:18:59
pretty much on everything except for Tumblr or whatever so and

00:19:02
it's either April Henry or April Henry books when some other

00:19:06
April Henry got it before me. I will make sure that all of

00:19:08
your links are in the show notes, and I just want to thank

00:19:11
you for spending your time with me today.

00:19:14
It's been really interesting and I love when I get to talk to

00:19:17
such an accomplished author. It's amazing.

00:19:19
Hopefully take away from it the idea of persevering because that

00:19:23
has worked for me in pretty much every situation.

00:19:27
You know, if Enterprise says they don't ever give back their

00:19:29
fees, well, they don't know me. Or if the doctor says there's

00:19:32
not an appointment available, oh, I'm going to make that

00:19:34
happen. And it's just because I just

00:19:36
don't take no for an answer and I just keep plowing ahead.

00:19:41
That's how you do it. That's how I need to do it, but

00:19:44
thank you again. All right.

00:19:46
Thank you very much. That was my conversation with

00:19:48
April Henry, and honestly, if there's one thing to take away

00:19:51
from this episode, it's this. Don't give up.

00:19:53
From over 100 rejections to becoming a best selling author,

00:19:57
April's story is proof that persistence isn't just part of

00:20:00
the journey, it is the journey. Be sure to check out her latest

00:20:03
novel, In the Blood, and keep an eye out for what's coming next.

00:20:06
Because of today's conversation is any indication she's far from

00:20:09
done. You can find all of her links in

00:20:11
the show notes. And as always, if you enjoyed

00:20:13
this episode. So don't forget to follow rate

00:20:15
and share Plot Twist Radio with a fellow book lover.

00:20:18
Until next time, stay curious and expect the unexpected.