Voted Author of the Year in the 2025 Bookstagram Awards, A.G. Mock is renowned for his trademark jaw-dropping endings. A two-time American Fiction Awards winner, his bestselling psychological thriller, Now is the Time of Monsters, earned the coveted Publishers Weekly BookLife Editor’s Pick for outstanding quality.
He is a full-time author and professional working member of both the ITW (International Thriller Writers) and HWA (Horror Writers Association).
Originally from Pennsylvania, Mock moved to the UK where he earned his bachelor’s degree before beginning his publishing journey in Yorkshire. He now lives in what he proudly calls his ‘forever home’ in Nashville with his wife, two adorable rescue dogs, and at least one cheeky ghost.
His wife and dogs he treasures wildly, the ghost he can take or leave.
Follow him on social media at @agmockauthor or visit AGMock.com to be the first to hear of his latest releases, tour dates, and to join his free Inner Sanctum email club.
I received an ARC of What Big Lies You Have from Net Galley. What Big Lies You Have doesn’t just tell a suspenseful story, it pressurizes you as you read. The anxiety in this book feels almost physical. Mock layers unease so skillfully that even quiet moments hum with tension. Every knock, every glance, every half-truth feels loaded, and you can’t shake the sense that something terrible is just one page away. It’s the kind of thriller where you don’t just follow the plot — you live the dread alongside the characters
My first book by A.G Mock thanks to ARC from net gallery. A addictive suspenseful thriller about love and loss with a twist. A twist on the tale of red riding hood.
Rosie Tanner went missing 28 years ago from her grandma home in Scarborough, nicknamed ‘little red riding hood’ because she was wearing a crimson hoodie when she vanished. A woman in Savannah claiming to be Rosie 28 years later. Emily Briggs, Rosie childhood best friend doesn’t believe her and investigates which forces her to revisit trauma of her past, discover disturbing truths and how far people will go to protect the ones they love. Goes between past and present day with different characters POV. If you enjoy twisty thrillers by authors like Freida McFadden, Daniel Hurst or Heidi Perks add this book to your to reads list.
A. G. Mock does it again with “What Big Lies You Have”! This dark, twisted thriller had me hooked from the very beginning. It’s packed with suspense, deception, jealousy, and lies, every chapter kept me wanting more. The tension never let up, and I found myself completely invested. I honestly got mad whenever I had to stop reading because I couldn't wait to see what happened next! If you enjoy addictive psychological thrillers full of secrets and shocking twists, this one is definitely worth picking up.
Most fairy tales warn you about the big bad wolf. What Big Lies You Have by A.G. Mock walks him right up to your door, knocks, and waits for you to answer - his newest psychological thriller doing what the best ones do: making you invite the danger in.
Emily Briggs and Rosalie Tanner have been best friends for as long as either can remember. They even share a birthday, and at thirteen they could pass for twins. Then Guy Fawkes Day, 1989, arrives and rewrites both their lives forever - or at least for the next twenty-eight years. Emily has carried the guilt of that day ever since, the day Rosie vanished. The media called it the Little Red Riding Hood case; Rosie was wearing a red hooded cape when she was taken from her grandmother's house by the Big Bad Wolfe. Emily just calls it the worst day of her life - she lost her best friend and became a victim in a single afternoon. That is, until the phone rings. A BBC reporter, or so he says, asks how she feels about reports that Rosalie Tanner has been found alive and living in the US. You'd think she'd be overjoyed. She isn't.
A trip across the Atlantic to learn whether Rosie is really who she claims to be becomes a slow, deliberate excavation - of a memory, and of secrets Emily would have paid anything to keep buried.
Mock builds characters the way a master mason lays stone: with depth, patience, and load-bearing weight. Emily's scars hold up the whole house. She carries the trauma of witnessing her best friend's abduction, and her suspicion of everyone's motives runs bone-deep. She's our guide and our most unreliable narrator, papering over secrets with lies because she's desperate to keep the truth in the ground. Then "Rosie" returns and strikes the match. Is she Emily's redemption, a con artist, or something else entirely? Mock makes you love his characters and distrust them in the same breath. Pure genius.
He takes one of the oldest stories we know - Little Red Riding Hood - and revives it with a twist, where the scariest question isn't what big teeth you have, but what big lies you've been telling yourself for twenty-eight years.
What Big Lies You Have is a dual-timeline thriller charged with grief, paranoia, and dread. The pacing starts steady, then ramps fast, and soon you're riding the momentum that lives in the drip, drip, drip of revelation. You can feel the tension pulse off the page, priming you for twists that land hard. Mock earns his ending, too - one stone slips, and the whole hillside comes down in a landslide of revelations.
If you want a psychological thriller where the mystery is a mirror - where the lie is the character, not just the clue - pre-order What Big Lies You Have today for its September 22, 2026 release. Seriously, go pre-order now. I swear you won't regret it.
I'd like to thank author A.G. Mock for requesting my review, and NetGalley for providing an Alpha/Beta/ARC copy of What Big Lies You Have. As always, all opinions and reviews are of my own volition, Karen Brooks aka The Tx Lit Chic. I have not been promised any compensation, current or future, by the author or publisher for a fair and honest review of What Big Lies You Have.
Thirteen-year-old best friends Emily Briggs and Rosalie Tanner are inseparable. On Guy Fawkes Day, Rosie disappears while wearing a red hooded cape after leaving her grandmother's house. Emily is found traumatized and covered in blood, but Rosie is never found. Twenty-eight years later, Emily receives unbelievable news: a woman in the United States claims to be Rosie. Emily travels across the Atlantic to discover whether her childhood friend has really returned—or whether someone is exploiting the tragedy. As she investigates, long-buried memories, family secrets, and lies begin to unravel. The novel alternates between the events of past and the present, slowly revealing what really happened.
Review:
A.G. Mock delivers another engrossing psychological thriller with "What Big Lies You Have", blending emotional depth, suspense, and fairy-tale symbolism into a story that is both haunting and addictive. Inspired by Little Red Riding Hood, the novel transforms a familiar tale into a dark mystery about trauma, memory, and deception, creating an atmosphere of constant unease that lingers long after the final page. The story is built around Emily Briggs, whose life has been shaped by the disappearance of her childhood best friend nearly three decades earlier. Emily is a compelling protagonist, carrying years of guilt and emotional scars, and her unreliable memories make it difficult to know who—or what—to trust. The dual timeline works exceptionally well, gradually revealing pieces of the past while keeping the reader invested in the present-day mystery. The novel is undeniably a slow burn. Rather than racing from one shocking event to another, Mock carefully develops his characters and allows the tension to build chapter by chapter. The pacing may test the patience of readers expecting immediate action, but once the story reaches its midpoint, it accelerates dramatically. The suspense becomes relentless, the revelations come one after another, and the final act delivers the kind of twists that repeatedly force you to rethink everything you believed. One of the book's greatest strengths is its atmosphere. Instead of relying on graphic violence or gruesome crime scenes, Mock creates suspense through psychological tension, buried secrets, and the emotional weight of grief and guilt. Nearly every character has something to hide, making it impossible to fully trust anyone. "The Little Red Riding Hood" inspiration is woven naturally into the narrative, adding an unsettling layer without ever feeling forced or gimmicky. The only real criticism is the pacing in the first half and a few moments where the complexity of the story can briefly become confusing. Overall, "What Big Lies You Have" is a gripping psychological thriller that rewards patient readers with memorable characters, an emotionally charged mystery, and a series of clever twists.
Thanks to the author and Victory Editing Netgallery Co-op for ARC copy of the novel.
This entire review has been hidden because of spoilers.
What Big Lies You Have is a slow-burn psychological thriller that rewards your patience. If you go in expecting nonstop action, this may feel a little deliberate at first, but stick with it because the payoff is worth it.
The story follows Emily as she's forced to confront the disappearance of her childhood best friend nearly three decades later. The Little Red Riding Hood inspiration is woven throughout the novel in a way that feels fresh rather than gimmicky, adding an unsettling atmosphere that lingers long after you put the book down.
The biggest strength of this book is its characters. Emily is complex, flawed, and believable, and the emotional weight of grief, guilt, and trauma drives the story just as much as the mystery itself. As the secrets slowly unravel, I found myself questioning everyone's motives, and the final twists landed exactly the way a psychological thriller should.
My only reason for giving this four stars instead of five is the pacing. The first half moves slowly and requires some patience before the story really takes off. Once it does, though, the tension builds steadily and the ending delivers.
If you enjoy character-driven psychological thrillers with unreliable memories, layered secrets, and an emotional mystery at the heart of the story, this is one to add to your TBR.
Thank you to NetGalley, the author, and the publisher for providing me with an ARC in exchange for my honest review.
I would like the thank A.G. Mock for the privilege of being an ARC reader through NetGalley for this book. Also wanted to thank you for letting us readers help choose the cover. I think all of us were quite thrilled with that. What Big Lies You Have did not disappoint!! Classic fairy tale Little Red Riding Hood we all know so well with some amazing twists.
Emily Briggs and Rosalie Tanner are two best friends that are so close you would swear they were twins. They are off to Rosie’s grandmothers house when their lives change forever. Rosie, wearing her red hoodie that her grandmother made has disappeared. Her best friend Emily is found covered in blood. The case has been dubbed “the disappearance of Little Red Riding Hood”. For years Emily has lived with her own scars from that day. Scars that Emily prefers are kept buried. That is until one phone call is answered. “Hi Em, it’s me Rosie”
This book had twists and turns I didn’t see coming. It is a slow burn psychological thriller. Starts out hot, warms in the middle and please pay attention in the middle, and then back to hot in the end. I thought I had the twist sorted but I was so wrong. The middle confused me at first. I wasn’t sure why that portion was so detailed but as you near the end it all ties together and blows your mind. The writing was brilliant!! A.G. Mock, thank you this book and opportunity to read it. Thoroughly enjoyed this book and would highly recommend you read it.
This book doesn’t just dig its claws into your heart.
It fucking tears it apart.
From the very beginning, you’re pulled into a web of lies, secrets, and truths so twisted you’ll start questioning your own sanity right alongside the characters.
Just when you think you’ve finally found your footing…BAM. Another twist. Another revelation. Another carefully buried truth clawing its way to the surface.
And the worst part?
You’ll believe it.
You’ll think you know what happened. You’ll think you know who to trust. You’ll think you’ve finally figured out what’s real… . . . . This story is heartbreaking in the most deceptively cruel way. Twisted. Haunting.
The truth keeps slipping through your fingers, leaving you grasping at pieces of a story that may have never been what you thought it was.
And by the time the lies start unraveling, you’re left wondering:
Who’s lying?
Who’s telling the truth?
What the hell is actually real?
Because sometimes the truth doesn’t set you free.
Sometimes the truth is the thing that destroys you.
A.G. Mock… respectfully, what the actual fuck did you just do to me?
Thank you to NetGalley and Victory Editing for this ARC in return for my honest feedback.
I previously read Now is the Time of Monsters by AG Mock and really enjoyed it. I also enjoyed this. Great character development and intriguing, unique storyline. I wondered throughout why he chose to set the story in England and it wasn’t until I was nearly done that I realized it was likely because the original Red Riding Hood took place in Europe.
I struggled to keep the characters straight. I probably could have used an org chart early on, I kept confusing which parents went with what girl lol. No fault to the author here, purely my own struggle but I mention it in case it helps another reader in the future.
Anyway, one plot hole and the reason for my spoiler tag…I was left confused with how the entire town did not realize Emily was actually Rose? Was she forced to spend her entire childhood inside? I don’t recall that being addressed and it bothers me. Did the Tanners never force to speak to her, to get her story about their daughter’s last day?
This entire review has been hidden because of spoilers.
My head is still spinning. Like not just a little woozy, it is full on concussed. Brains mushed. Just wow. I did not expect this book to take me on the ride that it did, with twists so abrupt I was left flipping back a page and audibly saying “wait, what?!” all while devouring it at a pace I couldn’t slow, even though I tried my hardest because I didn’t want it to end! The story flipping between childhood and 28 years later was easy to follow, the characters (all of them) grabbed you in the gut in some way, and nothing will prepare you for the twist at the end. All I will tell you is that something will be niggling around in your brains the whole time you’re immersed in this story and it won’t reveal itself until the end. And when it does, you will be left staring blankly at the page (you’ll know when you get there), then staring blankly at the wall, and then you’ll just have to close your eyes for a moment because you won’t be able to believe what you just read. 🐺🤯 You’re welcome.
What Big Lies You Have will be released on 9/22/26!!
This is a slow burn thriller; kind of like a roller coaster that starts slow, but when it takes off, it has so many twists, turns and jaw dropping moments until the very end. It follows Emily Briggs and Rosalie Turner who have grown up together and even share a birthday. They are the best of friends and are always together. In 1989, at 13, they are excited to attend Guy Hawkes Day. Emily’s mother drops them off. When it rains and the carnival is shut down, they decide to go to Rosie’s grandmother’s house. What follows changes their lives forever. I love the way A J Mock wove Little Red Riding Hood into the story and made it his own. Rosie was wearing a red hooded cape that day and the carnival worker’s name is Levi Wolfe. The characters were so well developed and I loved the dual timeline! Everytime I thought I knew what was happening, along came another twist! I thoroughly enjoyed this book! Thank you to Netgalley and A J Mock for this ARC. I am leaving this review voluntarily.
If you had a past that was completely bad, wouldn't you want it to stay in the past. Yes I would if it was anything like Rose and Emily's. I loved this book. I finished it a little too quick. What a great page turner. The twists and turns were all through the book and always a new surprise. When it comes to the past, things. need to stay there. That's why they call it the PAST. Poor Emily and Rose...... lives ruined, brutal murders, families destroyed. I got so into this book that I was almost shouting at the characters when they were doing something they shouldn't. I was so into the book that I couldn't put it down. I kept telling Emily, "No Don't Go There, or "No Don't Do That." I love it when I get that into a book. A.G. Mock has done it again with this one. I would recommend this book to anyone who loves a great page turner, suspense, murder, lies, twists and turns and great surprise ending. Coming out on Amazon on Sept. 22. A Must Read.
I absolutely loved Now Is the Time of Monsters by A.G. Mock, so I was very excited to receive an ARC of his latest book.
In typical A.G. Mock style, there are plenty of twists, although I did see some of them coming. I found it to be an enjoyable read, I liked the characters, and I really loved the idea of the “Little Red Riding Hood” element. I actually found myself wishing we’d delved into that a little more.
However, I didn’t quite love this one as much as I wanted to. It’s definitely a slow burn, and I found myself getting distracted at times. It wasn’t until around the 75% mark that I really started to feel excited about where the story was heading.
Would I read it again or purchase a hard copy like I did with Now Is the Time of Monsters?
Probably not. 🫤
That said, I still enjoyed the experience, and I’ll absolutely be keeping an eye out for what A.G. Mock does next. 👀 ⭐️⭐️⭐️ .5
I love any book that can still surprise me, and this one absolutely did. Every time I thought I had it all figured out, another twist had me questioning everything again. I honestly never knew where it was going next.
This story grabbed me right away, and I flew through it because I just had to know the truth! It's been a long time since any book kept me guessing like this. And turning pages like my life depended on it because it had me so involved 🤣.
Definitely one of my favorite reads of the year. If you're a fan of twisty, page-turners, don't skip this one!
This was a great story following Emily Briggs and Rosie tanner. Rosie goes missing and 28 years later she resurfaces and someone claims to be her. She has to travel to the USA to find out for sure if it’s her friend who was presumed deceased.
The beginning was a slow burn as someone else said but about halfway through, it picks up the pace. The twists and turns were unpredictable and not at all what I expected.
I saw another review mention that it was a little hard to follow and I would agree that at one point it was, but I don’t want to give away any spoilers.
This is the first book I've read from this author. I'm now a huge fan! I loved the writing style, it drew me in for the entire book. I literally couldn't put it down. I read it in 2 days. If life wasn't in the way I would have read it in one sitting.
It had me hooked from the first page and kept my attention throughout the whole book. Multiple timelines and so many twists and turns that gave me whiplash.
I absolutely loved this book! A. G Mock is now on my list of 'automatically read' authors. I highly recommend this one. I'm going to have to read his entire blacklist!
A.G. Mock does it again! He creates stories that creep into your mind, contort all reasonable logic and will have you second guessing your own thoughts! 🤯🤯🤯
Prepare yourself for an experience like none other! The psychological thriller retelling of Little Red Riding Hood from the author known for twisting your mind beyond your own imagination! 🐺🩸
OH MY GOD. OH. My. G O D!!!!!! I just finished WBLYH. ….. mind blown!!!!!! It was like aggressive pinball going through my brain trying to grasp WTF was going on. This wicked roller coaster of a story is just what the doctor ordered! A must-read for ALL psychological thriller and horror fans! Twists and symbolism galore! You’ll be hooked from page one! So honored to be an ARC reader for Mr. Mock!
I received this book as an arc from NetGalley. This is a thriller you’re not going to want to put down! So many twists and turns, it had my head spinning, but in a great way! AG Mock really knows how to throw in so many twists that you don’t see coming!
AG Mock has done it again! This book has more twists than a mountain road!
It snatched my up in the beginning and just when I thought it was loosening it's grip, it tightened up and ran! If you're looking for a book to mess with your head, look no further!