Two sisters. One fire. A secret that won't burn out.

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The Grayson sisters are trouble. Everyone in their small town knows it. But no-one can know of the secret that binds them together.

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Hattie is the light. Penny is the darkness. Together, they have balance.

But one night the balance is toppled. A match is struck. A fire is started. A cruel husband is killed. The potential for a new life flickers in the fire's embers, but resentment, guilt, and jealousy suffocate like smoke.

Their lives have been engulfed in flames - will they ever be able to put them out?

Steeped in intrigue and suspense, Sister of Mine is a powerhouse debut; a sharp, disquieting thriller written in stunning, elegant prose with a devastating twist. Fans of Liane Moriarty's Big Little Lies and Shari Lapena's The Couple Next Door will be utterly absorbed by this compulsively readable novel.

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Praise for Sister of Mine:

“Propulsive.” —Refinery29’s “Best Psychological Suspense Novels to Read After Gone Girl“

“A twisty, claustrophobic nail-biter.” —Entertainment Weekly’s Hot Summer Thrillers

“Sibling rivalry on steroids.”—BookTrib

“Riveting… Readers will be keen to see what Petrou comes up with next.”
—Publishers Weekly

“Readers who enjoy the twisty plots found in Sophie Hannah’s and Lisa Jewell’s domestic suspense will want to give this one a try.”
—Booklist

“One of the best first novels I’ve read this year… A brilliantly conceived narrative with wonderful characters and great depth.”
―Globe and Mail

“Gripping, twisty, and singular …A not to be missed, well-worth-it read. Here’s hoping for more from this imaginative, insightful author.”
―New York Journal of Books

“A stark reminder of the wicked webs we weave.”
—Top Shelf Magazine

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- Globe and Mail Top 100 Book

- Winner of the International Half the World Global Literati Award, 2017