Having lost all his money in hare-brained get-rich-quick schemes, old Angus Campbell has nothing to leave his heirs but the proceeds of his life insurance policies. After he falls to his death from a locked bedchamber in the tower of Shira Castle in the Scottish Highlands, his family gather. They are joined by amateur sleuth Dr Gideon Fell, who tries to solve the mystery. Is it suicide, or is it murder?

From Shira to Glencoe Gideon Fell trains his forensic intelligence on trying to discover the truth behind events. In the meantime a tabloid press reporter endlessly falls foul of the redoubtable lady of the house, two young people fall in love while arguing incessantly, and a cast of locals come and go as if this is all a normal days occurrence. And all the while bodies continue to pile up . . .

The Case of the Constant Suicides is a masterfully plotted locked-room mystery from the master of the art.