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?

שם הספר
Favorite greek myths
Mummies in the morning
The knight at dawn
Dinosaurs before dark
Night of the ninjas