When Kristy Thomas has the great idea to form a baby-sitters club--a chance to earn money and spend time with her friends, all the while doing something they each love to do--she has no idea how much the club will change everything.See where it all began, with the first four books in the Baby-sitters Club series.Baby-Sitters Club #1: Kristy's Great Idea Baby-Sitters Club #2: Claudia and the Phantom Phone Calls Baby-Sitters Club #3: The Truth About StaceyBaby-Sitters Club #4: Mary Anne Saves the Day