When a twelve-year old girl named Cleo and her cat, Muffin, become the newest members of PURR (Peace Urgently Requires Reasonableness), a secret society of cats fighting for peace, they aren't exactly sure what they're getting themselves into. Then, PURR discovers that KLAW (Cats Loving Awful Warfare), an evil secret society of cats, is planning to send dogs to space for ransom. PURR tasks Cleo to infiltrate KLAW as a secret spy so together they can stop them. It will take the intelligence, confidence, and tenacity of a feline to save the world from KLAW's evil plans. Does Cleo have what it takes?

Includes gorgeous black-and-white watercolors by two-time Caldecott Medalist Chris Raschka.