A Mixture of Frailties, published by Macmillan in 1958, is the third novel in The Salterton Trilogy by Canadian novelist Robertson Davies. The other two novels are Tempest-Tost (1951) and Leaven of Malice (1954). The series was also published in one volume as The Salterton Trilogy in 1986. The trilogy revolves around the residents of the imaginary town of Salterton, Ontario which bears some resemblance to Kingston where Davies studied at Queen's University. Each book focuses on different protagonists but includes some characters from other books. Source: Wikipedia (en)