Mog the cat is the main character in a series of children's books written by Judith Kerr. The regularly occurring characters include Mr and Mrs Thomas (Mog's owners) and their two children Nicky and Debbie. In each book Mog gets into a different conundrum with a new character or event. Unusually for a popular children's series, Mog dies of old age in the final book, 2002's Goodbye Mog.
