Co-authored by Sonya Sargent and Anthony M. Strong

A woman who can’t remember her past encounters a mysterious stranger in a chilling novel of mounting psychological suspense by the authors of The Last Girl Left.

She wakes on the shore of a remote lake in the middle of the night, freezing and afraid. With no memory of who she is or how she got there, she stumbles frantically toward the lights of a house. The handsome stranger who lives there is shocked to see a woman on his doorstep and takes her in.

Trapped by a winter storm and cut off from the outside world, she starts to suspect that all is not right with the house on Gravewater Lake—or the man, who says his name is Gregg. Because there are whispers in the night, and phantom footsteps pace the halls. Is Gregg hiding a dark secret, or is she losing her mind?

As she struggles to remember her past and make sense of her present, she soon discovers that people are not always who they seem, and the truth might be more deadly than she could ever have imagined.

PUBLISHER

Thomas & Mercer, March 2025

“Gravewater Lake is a psychological thriller extraordinaire, a mind-bender of a tale that grabs hold and never lets go. A.M. Strong and Sonya Sargent have fashioned an exquisite tapestry drawn in deceit and desperation, shaded by noirish underpinnings that leave us questioning the very nature of reality itself. A Hitchcockian romp of madness and mayhem, Gravewater Lake drowns us in the darkness that lurks at its core. Not to be missed!”
-Jon Land, New York Times and USA Today bestselling author

“A.M. Strong and Sonya Sargent have really found their stride in psychological thrillers with their latest novel. Gravewater Lake opens by plummeting off a roller-coaster precipice, then dives into breathless twists and turns that’ll keep you flying through this story. With an entire cast of nuanced characters, any one or all of whom may not be who they seem, when people start dying, you’ll have no idea who to trust and who to fear. The authors will keep you guessing until the very last page, and even then you’ll be surprised at what these two diabolically brilliant writers have cooked up. This one will keep you up late and sleeping with a light on. If you like thrills, chills, and things that go bump in the night, this book is for you.”
–Cindy Dees, New York Times and USA Today bestselling author

“Gravewater Lake hooked me from the first chilling chapter and kept me devouring the pages. It’s psychological suspense at its best with an absolutely brilliant twist.”
–Jenifer Ruff, USA Today bestselling author

“Gravewater Lake is a psychological thriller at its absolute best. A.M. Strong and Sonya Sargent masterfully create a story of a heroine isolated during a storm, memory gone, with secrets and danger around every bend. Can Anna trust the handsome stranger who rescued her? Or the author across the lake? And who is the sinister stranger who shows up at the door? Brimming with secrets and suspense, Gravewater Lake is a read-in-one-sitting mind-rushing tale with a shocking ending that even the most seasoned readers won’t see coming. Without a doubt, Gravewater Lake is a must-read for the new year.”
–Elise Hart Kipness, Amazon bestselling author

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• Brilliance

Co-authored by Sonya Sargent and Anthony M. Strong

When a woman returns to the scene of the horrific mass murder that shattered her life, the nightmare begins again in a chilling novel of psychological suspense.

Five years ago, Tessa Chamberlain was the lone survivor of a beach house massacre that left three of her friends dead—and Tessa with an inescapable, unending dread. Now she’s going back to face her fears.

Renting the same beach house where she almost died, Tessa returns to lonely Cassadaga Island off the coast of Maine long after the tourists and summer residents have departed for the winter. But as the fog rolls in and the nights grow longer, she wonders if she made a terrible mistake. There are footsteps on the porch, creaks from the second floor, and an unsettling feeling of being watched.

If only someone believed her. Because the terrors Tessa thought were long behind her are starting again. And this time, trapped and alone, she might not be lucky enough to survive them.

PUBLISHER

Thomas & Mercer, April 2024

“The Last Girl Left starts with a heart-pounding bang and then just keeps getting more intense from there…a chilling, thrilling read from start to finish. A.M. Strong and Sonya Sargent will keep you turning the pages and guessing until the very end. Don’t pick up this book and start reading unless you have a few hours because you’re going to read it in a single sitting like I did. The authors will dare you to put this story down, and you won’t be able to. A terrific thriller by a talented writing duo…I can’t wait to see what they write next…”
-New York Times and USA Today bestselling author Cindy Dees

"A.M. Strong & Sonya Sargent’s THE LAST GIRL LEFT is a spine-tingling thriller that grips you from page one and doesn’t let go. Tessa Chamberlain may have survived a beach house massacre but five years later her nightmares–real and imagined–are about to get worse. A masterful thrill ride, this novel takes readers into the depths of darkness and back. A phenomenal and terrifying read."
-Amazon bestselling author Elise Hart Kipness

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• Brilliance

Co-authored by Sara Sargent and Anthony M. Strong

Sixteen years ago, her sister vanished while on a cross-country road trip…

FBI Special Agent Patterson Blake thinks the trauma of her sister Julie’s disappearance is a distant memory. But when she helps raid the lair of a vicious serial killer, her unresolved emotions come crashing back with dire consequences.

Finding herself sidelined, and in danger of losing the job she loves, Patterson fears for the future. Until she discovers new and disturbing details of her sister’s last days. Armed with a fresh sense of resolve, Patterson decides to follow in Julie’s footsteps and do the impossible. Unravel the mystery of what happened to her sister, and why.

But when she stumbles across a sadistic sociopath, a murderer who has been abducting girls for decades and leaving them to die a gruesome death, the young FBI agent will discover that the past is a dangerous place, and those who dwell within are still out there, waiting for new prey.

And in Patterson Blake, they might just have found it…

PUBLISHER

West Street Publishing, January 2022

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• West Street Publishing

Foreign

• German: West Street Publishing

Co-authored by Sara Sargent and Anthony M. Strong

Patterson’s search continues in the gripping follow-up to Sister Where Are You.

Following the clues of her sister Julie’s disappearance to Dallas, newly reinstated FBI Special Agent Patterson Blake finds herself saddled with a rookie partner she feels can only get in her way. A cocky ex-cop who thinks he doesn’t need a babysitter. But that proves to be the least of her problems…

After discovering a witness who could hold the key to finding her sister, the case takes another dire turn. The woman goes missing before Patterson can meet with her.

Is there a connection to Julie’s case? Is someone trying to stop Patterson from uncovering the truth? There’s only one way to find out. She must locate the missing woman… and quickly… even though it means putting herself, and her new partner, in mortal danger.

PUBLISHER

West Street Publishing, March 2022

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• West Street Publishing

Foreign

• German: West Street Publishing

Co-authored by Sara Sargent and Anthony M. Strong

Some monsters prowl in daylight…

FBI Special Agent Patterson Blake is armed with new information and ready to continue the search for her sister Julie, who disappeared sixteen years ago on a cross-country road trip.

But Dallas isn’t done with her yet.

A predator is on the loose, snatching girls off their bicycles as they ride home from school and carrying them away. When the girls start showing up dead, investigators realize they have something even worse on their hands. A depraved psychopath with an unknown agenda.

Ordered to stay in Dallas a while longer, Patterson and her rookie partner, Marcus Bauer, must find this burgeoning serial killer before he kills again.

PUBLISHER

West Street Publishing, September 2022

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• West Street Publishing

Foreign

• German: West Street Publishing

Co-authored by Sara Sargent and Anthony M. Strong

Patterson Blake is in more danger than ever before…

Following the clues of her sister’s disappearance to Amarillo, FBI Special Agent Patterson Blake is hopeful she will finally learn the truth about Julie. But there’s a problem. The man who might hold those answers has been accused of a heinous crime. One he claims to be innocent of.

When Patterson starts to dig into the case, she stumbles upon a dangerous conspiracy that threatens to not only derail her search for Julie but could also get her killed.

With the clock ticking and her very life in danger, Patterson must unravel a plot bigger than any she has ever encountered, even as forces she cannot control close in around her with one aim… To stop her by any means necessary.

PUBLISHER

West Street Publishing, February 2023

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• West Street Publishing

Foreign

• German: West Street Publishing

Co-authored by Sara Sargent and Anthony M. Strong

Patterson Blake follows her sister’s trail to Santa Fe.

After following her missing sister’s trail from Oklahoma City to Dallas, and then on to Amarillo, Patterson Blake finds herself in Santa Fe looking for a man who might hold the key to unraveling the mystery of Julie’s disappearance. But instead, she uncovers a sixteen year old cold case murder that might provide an answer no one wants to hear.

To make things worse, previous events are coming back to haunt her in the form of a man who wants revenge, at any cost.

As the walls close in, and answers feel further away than ever, Patterson finds herself in a situation that she might not escape. At least, alive…

PUBLISHER

West Street Publishing, September 2023

Co-authored by Sara Sargent and Anthony M. Strong

A shocking murder rocks a small seaside community…

Newly minted special agent, Patterson Blake, fresh out of Quantico, hasn’t seen much action since arriving at the FBI’s New York Field Office weeks before. In fact, she’s beginning to think her life will be nothing but routine inquiries and boring paperwork.

Until she receives a call late one night with an unexpected assignment. A man has been brutally murdered. Bludgeoned to death on the stage of a community theater in the idyllic resort town of Montauk.

Now she must team up with an experienced special agent to investigate a disturbing crime that has left an entire community on edge.

As the rookie agent and her partner dig deeper into the horrific killing, they will uncover a web of deceit and betrayal that will leave them baffled. And put their very lives in danger.

Patterson Blake is about to discover that the FBI is anything but boring…

PUBLISHER

West Street Publishing, October 2021

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• West Street Publishing

Foreign

• German: West Street Publishing