The Casson family is a fictional family created by British author Hilary McKay. They are featured in a series of children's books that explore the everyday lives and adventures of the family members. The stories often highlight themes of friendship, family dynamics, and the challenges of growing up. The family consists of parents, Mr. and Mrs. Casson, and their three children: Rose, Ben, and Caddy. Each character has a distinct personality, contributing to the humorous and relatable situations they encounter. The series is well-loved for its warmth and insight into family life.