Pie Magic
Toby Forward, Ken Brown
Hardcover
(Andersen Press, March 15, 1995)
Bertie hates being fat but he can't stop himself gorging on chocolate. One day he is delivering a batch of samosas to a new shop, Gupta's Remedies, where he is given a potion to make him lose weight. He takes the whole dose at once and wakes up to find himself floating near the ceiling.