In London, there is a family publishing firm, Barnabas. There are a number of people working there including cousins: Mike (who always just misses the next big thing, Ritchie (handsome but intelligent) and Paul (a known liar and bragger who is currently missing but no one seems concerned.There are also some other assorted family members: John (irascible), Miss Curly (seems to know the people she works with rather well), Gina (Paul's American wife) as well as one or two others. Peter Riggett who becomes a witness for the court though he knows more than he was telling.
One of the cousins is found dead in a locked room. The problem is that the body has been dead for several days; he was not in the room the night before. And it is that point that gets one of the other cousins arrested for murder. It will be up to Campion to solve the mystery.
This was a well crafted story that was a little convoluted but highly enjoyable.
Four stars
This book came out February 1, 1936
Follows Death of a Ghost
Followed by The Case of the Late Pig
Borrowed as audiobook from Audible
Opinions are my own