Quietly in Their Sleep (Guido Brunetti Series #6)

A nun has left her convent after a series of suspicious deaths: “Leon’s novels are always a pleasure.” —The Washington Post
 
In Venice, Italy, Commissario Guido Brunetti comes to the aid of a young Catholic sister, who has left her convent after five of her nursing home patients died unexpectedly. In the course of his inquiries, Brunetti encounters an unusual cast of characters, but discovers nothing that seems criminal. The police detective must determine whether the nun …