Jack and Annie are on very thin ice!
Morgan Le Fay, the magical librarian, sends the children and the treehouse to the Arctic and tells them she'll send somebody to meet them there. But they're surrounded by ice and snow and there are huskies and polar bears all around them too - will they freeze to death first?
Beautifully written, full of suspense and well-researched
An easy, fast-paced and exciting read which will appeal to both boys and girls