The internationally bestselling YA thriller by acclaimed author, Karen M. McManus - now a major new TV series!

Five students go to detention. Only four leave alive.

Yale hopeful Bronwyn has never publicly broken a rule.

Sports star Cooper only knows what he's doing in the baseball diamond.

Bad boy Nate is one misstep away from a life of crime.

Prom queen Addy is holding together the cracks in her perfect life.

And outsider Simon, creator of the notorious gossip app at Bayview High, won't ever talk about any of them again.

He dies 24 hours before he could post their deepest secrets online. Investigators conclude it's no accident. All of them are suspects.

Everyone has secrets, right?
What really matters is how far you'll go to protect them.

'Tightly plotted and brilliantly written, with sharp, believable characters, this whodunit is utterly irresistible' - HEAT