I Know What You're Hiding

Zole Gale #2

by Jack Heath

A deadly blaze. A desperate girl. Three days to crack the case.

Everyone knows the story. Jamie George was the golden child. Her sister, Morgan, was nothing but trouble. When their house mysteriously burned down, Jamie barely survived. Morgan wasn’t so lucky.

Three years later, teen podcaster Zoe Gale receives an urgent message. Jamie needs help. She’s received a threat written in blood and a demand for cash. Instead of paying up, Jamie wants Zoe to unmask the blackmailer.

Zoe’s tangled with dangerous people before. And there’s something about Jamie she just doesn’t trust. But soon she’s digging up secrets someone would kill to keep buried ...

Genres: Thriller, Mystery Thriller, Crime, Mystery

320 pages

Published April 1, 2026

About the author

Hi, I'm Jack! I'm a novelist from Canberra, Australia. My work includes 300 Minutes of Danger (for kids), Kill Your Husbands (not for kids), and forty-eight other books, which have sold over a million copies in ten languages. I live with my wife, four chickens, three possums, two cats, some fish, and a pair of human children. 🏡

Reviews

[Zoey Scicluna]

This book was just as good as the first. I loved the plot and how the story played out and I couldn’t guess what was coming next. Would recommend this series.

[Anakin]

Jack Heath has killed it again!

I throughly enjoyed “if you tell anyone you’re next” so the minute this book landed in my local bookstore I had to grab it. And Heath did not disappoint!

I devoured this book in a day. I’m so thrilled Heath decided to continue with a recurring character (Zoe Gale) and it was a treat to get to see Christian and Zoe again. (FYI it is not necessary to read “if you tell anyone you’re next” but I would recommend it).

Zoe Gale is as unhinged as she always is and I live for her sarcastic responses. The mystery was incredibly suspenseful and just when I thought Heath had finished with all the mind blowing twists my brain was rewired with that final little surprise with who was behind the tracker. So sneaky :)

It was great to see interactions with Zoe and her Dad and to hear his words of wisdom this time and I was not prepared for the tear jerker at the end.

My only minor flaw is that provided I read the blurb before I read the book I wish the Prologue was a bit more vague 😉

Jack Heath and Holly Jackson are my top picks for YA Thriller and I look forward to future books Heath wishes to release. 📚

[Sienna Jannusch]

Zoe Gale is a stubbornly determined teenage girl with a flair for journalism and seeking the truth amongst lies. First, in the disappearance of a friend (shown in ‘if you tell anyone, you’re next’) and now as a favour for her brother who begs her for help with a friend who’s life is filled with reminders of the tragedy that started it all.
I love how she keeps key aspects throughout these books (that I believe should be presented as a series) but still changes as she grows older.
Jack Heath is an incredible writer that knows how to keep audiences engaged in thrilling twists and turns.

I definitely recommend to those who enjoy a mystery/thriller story with a strong female lead that isn’t completely surrounded with perfection and isn’t afraid to show her real self - flaws and all - and to reveal where lies are hidden within the truth.

[caitlin thomson]

3.5 starsss

[whatbooknext]

What is I Know What You’re Hiding about?

A podcaster is asked by her brother to investigate a mystery note and find its sender. The note has been sent to a friend of his, who he is trying to help. She has lost her twin and home to a devastating arson.

Plot summary of I Know What You’re Hiding (No Spoilers)

Zoe and her friend Niamh are crime podcasters. They don’t have a large following (less than 100), but they are passionate about what they do. Zoe is an excellent investigator, using quick thinking, intensive research and a desire to uncover the truth in her work. Niamh is a skilled cyber sleuth, using technology to aid their investigations.

When Zoe is asked by her older brother to investigate something for him, she’s intrigued. It involves a friend of his who has lost a twin and gained terrible scars in a house fire. She also has a secret.

When she receives a note that looks like it’s been written in blood, she’s scared. Someone claims to know her secret and it’s the last thing she wants known to the world. They have demanded $10,ooo to keep quiet. Can Zoe figure out who is sending the notes?

What follows is an investigation that begins with a note that could be blood, or could be tomato sauce? Zoe relishes a challenge and with Niamh’s help just a call away, they get to work.

Jack Heath novels are always so readable. By which I mean – so easy to immerse yourself in from very early in the story. I Know What You’re Hiding has an intriguing prologue (which unfortunately for me, gave too much away), but not enough for me to put the book down.

A key thing for me in this YA Mystery Thriller was main character Zoe. An old saying goes, she has the hide of an elephant. This is Zoe through and through. She can just about talk her way out of anything, find ways to extract information from possible suspects or witnesses with cunning wee plans, and keep her cool while doing it. Even with this kind of personality, I still felt her relief or thumping heart after each stunt.

There is action, mystery, and fear for the characters as truths are revealed and villains appear in full colour.

I know What You’re Hiding is a clever, thrilling ride.

Age – 12+

[Susannah]

The fact that I could predict just about every plot twist in this fast-paced YA mystery novel should not be taken as criticism. I consider myself fairly genre-savvy, and it's clearly written for a teen audience. I would happily recommend it to any students in Year 6 or above who love mystery and suspense but are hoping for something more modern and less formulaic than Nancy Drew or Enid Blyton novels. This is my first Jack Heath book, and even though our earnest teenage protagonist Zoe was first introduced in a previous novel (which is briefly referenced), this novel can be read as a standalone.

One of the bigger plot twists is fairly obvious right from the start if you put the clues in the blurb and the prologue together, for which I blame the publisher. It did not ruin my enjoyment, as I spent the book wondering how and when Zoe would figure it out, but no blurb should be so blatant.

There are many more books by Jack Heath in the school library where I work, so I am looking forward to picking up another in the future.

Diversity notes: Casual and background. One character is blink-and-you'll-miss-it mentioned to have two dads, and it is suggested (and just about confirmed briefly in another conversation) that another character is gay.

[Helen Farch]

I loved this new book from Jack Heath and devoured it in one day.

Full of danger, plot twists, interesting characters, and non-stop action, this is a book that will appeal to reluctant readers and reading enthusiasts alike.

Zoe and her best friend Niamh are dynamic duo when it comes to solving mysteries, and I can't wait to read more of their adventures in the future (hint hint)

Another page-turner of a Young Adult thriller from a true master of the genre.

Thanks to Scholastic Australia for the review copy of this book

[K.]

Content warnings: fire, death of a sibling, kidnapping, grief, stalking, blood

3.5 stars

A solid little YA mystery, although I did guess exactly where it was going a couple of times. I do feel like it suffered slightly from the country town setting as the friends we know from the first book are back in Melbourne and only appear sporadically, mostly through texts or Facetime calls. Still, Zoe is a charming protagonist and this kept me on my toes!

[Noelle]

I enjoyed this one it was fast paced and easy to read! I liked the mystery although it was pretty predictable but still an entertaining YA read. I definitely want to check out the authors other books!

If you love YA thrillers that will have you hooked you should add this to your tbrs!

I Know What You’re Hiding is out now! ✨

[Ash]

4 STARS ⭐️⭐️⭐️⭐️
Vibe check: Tense Teen Drama, Fast Paced Thrills

full review ⬇️

After recently enjoying my first Jack Heath novel, I was keen to pick up his latest and it definitely delivered a solid mystery.

I didn’t realise when reserving at the library that this new book was very much young adult thriller territory, which I do enjoy… even if I always have a few moments where the teenage dialogue or drama makes me cringe slightly 😅

But Jack Heath really knows how to keep a story moving. The pacing was quick, the tension built well and there was enough mystery and suspicion woven through the story to keep me hooked and wanting answers.

The plot centered around secrets, lies and the danger of things buried beneath the surface eventually coming undone (classic YA thriller fun) with plenty of twists and escalating stakes.

This was a fun time and I’m still left as a keen bean ready to jump into Jack’s book back catalogue!

[Jen Nishi]

My goodness! This is a great young teen thriller. It’s like a younger version of AGGGTM. I will read whatever Jack Heath writes because his stories always balances plot and action with character development. Looking forward to what he writes in the YA / Middle grade world next.

[Phoebe Campbell]

was not expecting that. me likey

[Suzie]

Fast-paced enjoyable YA thriller

[Jaimie Peattie]

3.5*

[nicole rasmussen]

holy moly

[Heather Wilkinson]

Always keeps you guessing as to who has done what.

[Cherie Corbett-Jones]

A rollicking, fun, age-appropriate mystery with some great twists and turns with an antagonist that surprised me.

[Harriet]

Good book but could use some improvement but overall jack heath is a great author

[Ellice Denehey]

Loved the book, but did pick it half way through but did throw me little tid bits

[Alexandra Georgis]

It was decent, i mean...i didn't hatteee it. I didn't particularly like the ending. There are better thriller/mystery YA novels out there.