Lessons for Sleeping Dogs by Charlie Cochrane

Cambridge, 1921.
When amateur sleuth Jonty Stewart comes home with a new case to investigate, his partner Orlando Coppersmith always feels his day has been made. Although, can there be anything to solve in the apparent mercy killing of a disabled man by a doctor who then kills himself, especially when everything takes place in a locked room?

But things are never straightforward where the Cambridge fellows are concerned, so when they discover that more than one person has a motive to kill the dead men—motives linked to another double death—their wits get stretched to the breaking point. And when the case disinters long buried memories for Jonty, memories about a promise he made and hasn’t kept, their emotions get pulled apart as well. This time, Jonty and Orlando will have to separate fact from fiction—and truth from emotion—to get to the bottom of things..