Agatha Christie Crime Collection:Murder of the Orient Express; Death in the Clouds; Why didn't they ask Evans?

Name: Agatha Christie Crime Collection:Murder of the Orient Express; Death in the Clouds; Why didn't they ask Evans?
Author: /author/%E9%98%BF%E5%98%89%E8%8E%8E%C2%B7%E5%85%8B%E8%8E%89%E7%B5%B2%E8%92%82_(%E4%B8%80%E5%80%8B%E9%83%BD%E4%B8%8D%E7%95%99)