Kevin's Great Escape: A Roly-Poly Flying Pony Adventure by Philip Reeve
Kevin is a roly-poly flying pony. He has everything he needs - a constant supply of biscuits and his best friend, Max. Misty Twiglet is a famous pop star. She has everything she needs except for a perfectly quirky, one-of-a-kind pet. The roly-poly flying pony kind . . . When Kevin is kidnapped, Max and his sister daisy come to Kevin's rescue, and there's no way they're giving up on him without a fight.