Psychological Thriller Author
Dark secrets. Shattered trust. Stories that keep you turning pages long past midnight.
Explore the BooksPsychological Thriller Author
Dark secrets. Shattered trust. Stories that keep you turning pages long past midnight.
Explore the Books
About the Author
Brianne Sommerville studied English literature and theatre at Queen's University before building a career in public relations and marketing. Her love of storytelling eventually pulled her from crafting brand narratives to writing the kind of dark, twisting fiction she couldn't put down herself.
Her debut novel If I Lose Her arrived in 2024 to critical acclaim, drawing comparisons to the work of Ashley Audrain and Stacey Willingham. Her sophomore thriller What She Left Behind followed for fans of Mary Kubica and Colleen Hoover.
Brianne lives in Toronto with her partner and their three children under five — proof that real life can be just as thrilling as fiction.
Joanna Baker is a first-time mother diagnosed with postpartum depression after a near-fatal mistake brings her under Child Protective Services scrutiny. Experiencing increasing blackouts and memory loss, Jo struggles to understand her condition while fighting to maintain custody of her daughter. As family secrets surface, she must discover who truly has control over her life — before it's too late.
"And why don't I have the faintest memory of this?"
Recently fired and adrift, Charlotte Boyd agrees to oversee renovations on her parents' small-town summer home — a place that holds a tragic past. After discovering an enthralling diary hidden amidst junk the previous owners left behind, Charlotte connects with the author: a troubled teen named Lark Peters who died by suicide at the house sixteen years ago. In a search to uncover the truth, Charlotte must question those closest to Lark and reconcile her own past trauma, because if Lark was actually murdered, then whoever is responsible might be lurking in Charlotte's own backyard.
"How strange it feels to touch a dead person's things."
Praise
"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
"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."
Samantha M. Bailey, USA TODAY and #1 international bestselling author of Hello, Juliet
"A fresh, exciting voice in psychological suspense. Sommerville writes gripping thrillers with unflinching honesty — for fans of Ashley Audrain, Stacey Willingham, and Mary Kubica."
Average rating: 4.01/5 on Goodreads · 600+ ratings
Get in Touch
For event bookings, press inquiries, or just to say hello — Brianne would love to hear from you.
Literary Agent
Carolyn Forde, Transatlantic AgencyGeneral Inquiries & Foreign Rights
alex@risingactionpublishingco.comFilm & TV Rights
kescudero@sugar23.com