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 carefully adapted versions are shorter with the language targeted at upper-intermediate learners (CEF level B2).Hercule Poirot is travelling from France to England by plane. During the journey a passenger is murdered.Someone on the flight is guilty of the crime – but who could have a motive for killing an elderly lady? And how is it possible that no one saw it happen?