The story set in a military hospital inEngland during WWII was atmospheric to start with. Six doctors and nurses form a small coterie of friends. When a routine surgery goes wrong and it is found that it is due to an anesthetic wrongly administered, Inspector Cockrill knows he is facing a clever, professional who is actually mocking Inspector Cockrills efforts to solve the case. When a second death occurs the investigation can no longer be slowly attended to and cracks appear among the friends, because one of them is the killer. The investigation and detection was good, but the setting amidst the battles of WWII added to the story. Sent by Poisoned Pen Press for an unbiased review, courtesy of Netgalley.