The book was published in 1959. The event starts in country Romat, where the revolution is going on. Prince Ali Yusuf said to his pilot Bob Rawlinson to take the jewels out from the country. Bob hid them in the handle of a tennis racket of his niece Jenifer, who studies in the English boarding school "Meadowbank". At the beginnig of the semester a PE teacher was killed. Hercule Poirot joins the investigation. This book explores the themes of class differences, intrigue and ulterior motive. The most I remember the chapter of the beginning of the semester. In this book I like the espionage theme the most, that is almost never found in other books by Agatha Christie.