Magic Treehouse Polar Bears Past Bedtime

The Magic Tree House transportss Jack and Annie to the freezing Arctic. There, they must solve the final riddle to become master librarians. But it's not going to be easy--especially when they have cracking ice, a seal hunter, and a prodigious polar bear to deal with. Will they be able to solve the riddle before they get iced themselves

Author: Mary Pope Osborne

Publisher: Stepping Stone 

Released Date: 1993

ISBN: 9780679883418