From the New York Times–bestselling author of School for Dangerous Girls comes a suspenseful stunner of siblings caught up in a sinister deception.

Abby Goodwin is sure her sister Maya isn’t a murderer. But her parents don’t agree. Her friends don’t agree. And the cops definitely don’t agree. Maya is a drop-out, a stoner, a girl who’s obsessed with her tutor, Jefferson Andrews . . . until he ends up dead. Maya runs away, and leaves Abby following the trail of clues. Each piece of evidence points to Maya, but it also appears that Jefferson had secrets of his own. And enemies. Like his brother, who Abby becomes involved with . . . until he falls under suspicion. Is Abby getting closer to finding the true murderer? Or is someone leading her down a twisted false path?

“The Deadly Sister is riddled with red herrings and told by an unreliable narrator, which make the surprise ending all the more shocking. Well-drawn characters, realistic dialogue, and suspenseful twists and turns add to the appeal. Teens crave mystery, and this book will suit them just fine.” —School Library Journal (starred review)

“The page-turning action and the potent relationship between the two sisters will keep teens’ attention right up to the final confession.” —Booklist

“Let me tell you, The Deadly Sister was so creepily good, I would rather you read it yourself . . . Eliot Schrefer is the author of another thrillingly creepy book—and serious page-turner—The School for Dangerous Girls. The Deadly Sister is a great follow-up and a perfect read-alike.” —ThisGrrlReads

“The Deadly Sister is a perfect summer thriller.” —TeensReadToo