Brianne Sommerville is a Canadian author who writes female-driven thrillers with mental health representation. She is a member of International Thriller Writers and Crime Writers of Canada. Brianne studied English literature and theatre before entering the world of public relations. She lives in Toronto with her husband and three kiddos under seven and knows every episode of Peppa Pig by heart. Her debut, If I Lose Her, was published in 2024, and What She Left Behind (2025) is her sophomore novel.
Praise for WHAT SHE LEFT BEHIND:
“Set in a small town where everyone knows everyone else (or do they), WHAT SHE LEFT BEHIND, weaves plot twists, dual timelines, family dysfunction, and reckoning with the secrets of a very dark past, all at an absolute breakneck pace.”
– Ashley Tate, #1 national bestselling author of Twenty-Seven Minutes
“What She Left Behind satisfies that itch for a classic mystery while also delivering complex characters and a page-turning, dual timeline narrative. Throw in an old, creepy house and a dead girl’s diary, and you’ve got a gothic-esque thrill ride.”
– Jacquie Walters, author of Dearest
“Taut like a tightrope, WHAT SHE LEFT BEHIND is a profoundly impactful suspense about a woman who becomes entwined in the decades-old death of a teenager. With an ominous small town setting where secrets are well-hidden, this beautifully written and exquisitely tense sophomore novel kept me pinned to the pages, jaw dropped. The spine-tingling twists are staggering, and the perfectly timed reveals chilled me to the core. It’s an exceptional read.”
– Samantha M. Bailey, USA TODAY and #1 international bestselling author of HELLO, JULIET
“Brianne Sommerville has done it again! WHAT SHE LEFT BEHIND is a gripping thriller with characters to care about and a story that pulls you in and won’t let go until the very end. Sommerville has created a setting that transports you with its quaintness while at the same time has you questioning everyone in it—who can be trusted, who has done the unthinkable and who will stop at nothing to keep their secrets.”
– Jessica Hamilton, author of What You Never Know and Don’t You Dare
“Directionless and jobless, Charlotte finds herself tangled in a small town’s big secrets. A page-turning, twisty mystery where the past and present collide.”
– Marie Still, author of My Darlings
“In her signature enticing voice, Sommerville weaves a haunting, heart-pounding mystery where past and present blur, and nothing is as it seems. In an eerie, secret-filled small town, a murderer lurks in plain sight. Spooky, gripping, and unpredictable, this story will keep you questioning the past as the present sneaks up on you.”
– Maggie Giles, author of The Art of Murder
Welcome, Brianne!