Cat Among the Pigeons - Agatha Christie
First published 1959; cover shown is the 1976 20th impression Fontana Books (UK) paperback. Cover art by Tom Adams.
"Meadowbank is one of the most exclusive girls' schools in England. Who could think of murder there? But a train of violence, starting in the Middle East and involving jewels, intrigue and secret agents, did in fact reach its deadly climax within the precincts of the school. Worse still, it became clear that the killer must be one of the staff or one of the pupils: there was a cat among the pigeons."