The hit series is back, to charm and inspire another generation of baby-sitters! Mallory couldn't imagine not being in a big family like hers. There's always someone to do things with, and she likes to help take care of her younger brothers and sisters. But now Mallory's working on an important writing project, and she needs peace and quiet. So why won't everyone leave her alone? Nicky needs help tying his shoes, Claire wants a sandwich, someone has to break up the triplets' fight, and Mallory feels like a full-time baby-sitter.And there's only one thing to do: This baby-sitter is going on strike!The best friends you'll ever have—with classic BSC covers and a letter from Ann M. Martin!