Ambrose Chitterwick is in the lounge of the Piccadilly Palace Hotel, away from his overbearing aunt, to enjoy some afternoon refreshments when he witnesses a murder. It looks like suicide but he saw something being put into the lady’s coffee cup. He is Scotland Yard’s chief witness but he also conducts an investigation of his own. Despite his diffidence and self-deprecation, his sleuthing is not to be sniffed at. There are plenty of twists and turns in this journey to enjoy, especially with master narrator David Timson in the driving seat.

A journalist as well as a novelist, Anthony Berkeley was a founding member of the Detection Club and one of crime fiction’s greatest innovators. He was one of the first to predict the development of the ‘psychological’ crime novel.