M.B. Vincent is a married couple. She writes romantic fiction; he writes songs and TV theme tunes. They've even written musicals together. They work at opposite ends of the house, andthey meet in the middle to write about Jess Castle and Castle Kidbury, the West Country's goriest market town. When they're not making up books, tunes, and mysteries, they cram head out in an open- top car and explore. They particularly like West Country market towns ...