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Cover for Thicker Than Water

Thicker Than Water

A Novel

Megan Collins


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Two sisters-in-law find themselves at painful odds when the man who connects them—the brother of one, the husband of the other—is accused of a brutal crime in this twisty thriller from the author of the “exceedingly entertaining” (The New York Times) The Family Plot.

Julia and Sienna Larkin are sisters-in-law, connected by Julia’s husband and Sienna’s brother, Jason. More than that, the two are devoted best friends and business partners, believing that theirs is a uniquely unbreakable bond. To Sienna, her protective brother can do no wrong, and although Julia knows he’s not perfect, they’ve built a comfortable life and family together. Recently, Jason has been putting in long hours to secure a promotion at work, so when his boss is found brutally murdered—his lips sewn shut—the Larkins are shocked and unsettled, especially as local gossip swirls.

A few days later, Julia and Sienna’s lives are upended when Jason gets into a car accident and is placed in a medically induced coma. Worse, the police arrive with news that he’s the prime suspect in the murder investigation. With Jason unable to respond—and with Julia and Sienna working to clear his name—the two women find their friendship threatened for the first time: Sienna staunchly maintains her brother’s innocence, but as their investigation uncovers a complicated web of secrets, Julia is less sure she’s willing to defend her husband.

With her signature “moody and atmospheric” (USA TODAY) writing, Megan Collins has crafted a rich, gripping story that explores just how fragile our closest bonds can be.

Praise For Thicker Than Water: A Novel

"Thicker Than Water is a twisty, propulsive thriller with a powerful emotional heart at its core. Through a dark and clever mystery, Megan Collins examines the bonds of family, love, and friendship, and masterfully explores the meaning of culpability and forgiveness.”
—Robyn Harding, internationally bestselling author of The Drowning Woman

"Megan Collins’s Thicker Than Water is a triumph. Her writing is sharp and perceptive and the dual narrative gallops at a fantastic pace that left me breathless and wanting more. Each twist and turn feels earned as does the resolution. And at the heart is a beautiful friendship that shows how your chosen family can be more important than blood. You need this book in your life." —Catherine McKenzie, USA Today bestselling author of Have You Seen Her

Atria Books, 9781982196240, 320pp.

Publication Date: July 11, 2023

About the Author

Megan Collins is the author of Thicker Than Water, The Family PlotBehind the Red Door, and The Winter Sister. She taught creative writing for many years at both the high school and college level and is the managing editor of 3Elements Literary Review. She lives in Connecticut, where she obsesses over dogs, miniatures, and cake.