Ann M. Martin, 1955 - Ann Mathews Martin was born on August 12, 1955 in Princeton, New Jersey. She graduated from Smith College and worked as a teacher, was an editor of children's books for both Bantam and Scholastic, and then became a full time writer. Martin is the author of the well-known Baby-sitters Club books. She has also written other children's books, which include the title "Ten Kids, No Pets." She bases her characters, in part, on individuals in her own life; and the shy babysitter Mary Anne, is partially based on herself. She created a new series for middle grade readers called California Diaries, which follows Dawn of The Baby-sitters Club, after she moves to California.
Sims has illustrated many books for children.