The Magic Tree House transports Jack and Annie to the freezing Arctic where they must solve Morgan le Fay's final riddle in order 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!

The Magic Tree House transports Jack and Annie to the freezing Arctic where they must solve Morgan le Fay's final riddle in order 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!