Two Can Keep a Secret is a detective novel by American author Karen McManus. The book tells the story of twins, Ezra and Ellery, who move to a small town. This is a town where several young girls disappeared and were murdered years ago. Ellery and Ezra try to solve these mysteries, but soon realize that everyone in the town is hiding something, and discovering the truth can be very dangerous. The book is full of unexpected twists and tension, keeping the reader's interest until the very end.