The Cats of Seroster is a 1984 medieval fantasy novel by English author Robert Westall. Set in a fictionalised version of 16th Century France, the book follows the events in an unnamed city after the ruling Duke is assassinated by conspirators within his own nobility. Opening with the assassination itself, which occurs during the Duke's dinner with his young son, the book moves quickly to add its fantastic elements, as the heir to the duchy is rescued by the royal cat and taken into hiding in the abandoned city mausoleum. The cats of the city, divided into two socio-racial groups, hold a great meeting to decide how they should react to the human events; deciding that one of their number must be sent to tell their ancient friend, Horse, the news. The two groups of felines are the Miw, much