Famous scientists from around the world are disappearing and nobody knows why. The one woman who can help uncover the truth is dying after a plane crash. How can they discover where the scientists are without her? Meanwhile, in a hotel room in Casablanca, Hilary Craven decides to end her life. But her suicide attempt is interrupted by a man who offers her an exciting alternative… Collins brings the Queen of Crime, Agatha Christie, to English language learners. Agatha Christie is the most widely published author of all time and in any language. Now Collins has adapted her famous detective novels for English language learners. These readers have been carefully adapted using the Collins COBUILD grading scheme to ensure that the language is at the correct level for an intermediate learner. This book is Level 5 in the Collins ELT Readers series. Level 5 is equivalent to CEF level B2+ with a word count of 22,000 - 30,000 words. Each book includes: - Full reading of the adapted version available for free online - Helpful notes on characters - Cultural and historical notes relevant to the plot - A glossary of the more difficult words - Free online resources for students and teachers at Collins site.