Eight Detectives - Alex Pavesi

Penguin Books Ltd - <p>All murder mysteries follow a simple set of rules. In the 1930s, Grant McAllister, a mathematics professor turned author, worked them out, hiding their secrets in a book of crime stories. Then Grant disappeared. Julia Hart has finally tracked him down. She wants to know what happened to him. But she's about to discover that a good mystery can be murder to solve . .</p>