E
E. C. R. Lorac
Pen name - along with Carol Carnac - of Edith Caroline Rivett.
The striped suitcase
Chief Inspector Macdonald is faced with a perplexing case when a seemingly ordinary striped suitcase becomes central to a murder investigation. As he delves into the lives of the suspects, he uncovers a web of secrets and motives. The inspector must piece together the clues to reveal the truth behind the mysterious contents of the suitcase and the crime it's connected to.