Felidae Series by Akif Pirinçci

An internationally acclaimed suspense novel features the adventures of Francis, a house cat who, in trying to catch the murderer of his feline friends, meets up with a bizarre cat cult, a kitty computer whiz, and a perceptive Persian.

Francis enjoys a comfortable existence with his human companion Gustav, until one day disaster strikes. Gustav imports a live-in lover who aims to reform his lifestyle, and his cat's. Francis decides to escape and take his chances in the country. This novel is a sequel to "Felidae"