The hilarious and heartwarming tale of a magical friendship between a girl and a polar bear. One night a great big, white polar bear comes to stay with Tilly. He has black hooked claws and huge yellow teeth; but his white furry coat is warm and soft and Tilly decides he's the cuddliest thing in the whole world. Tilly soon finds out that a big bear can cause big problems - he takes a LOT of looking after! When she describes the bear's latest antics to her parents they think he's a figment of her imagination - but is he? A brilliantly clever and funny tale about an unlikely friendship, from beloved children's author Raymond Briggs.