Did someone say "field trip"? Gerald is all in He'd much rather be exploring the Taiga than sleeping through science class. His buddy Sam is all about spotting polar bears, but Gerald is having way too much fun building igloos and snow golems.

His science teacher says there are only two rules--learn something every day and stay with the group. (That's adult speak for, "don't get lost.") When Gerald discovers a secret trapdoor in an igloo, he doesn't exactly get lost. But . . . if he's not careful, his classmates might just lose him