A review by colinandersbrodd
Polar Bears Past Bedtime by Mary Pope Osborne

5.0

This installment takes Jack & Annie to somewhere in the Arctic - it is unclear whether they travel in tine as well as space - to seek out the answers to the final riddles of Morgan LeFay to earn the status of Master Librarians. Some implausible romping with polar bear cubs occurs, but it's all in good fun.