Osborne, Mary Pope creator Murdocca, Sal illustrator text New York Scholastic 1998 First Scholastic printing, September 1998 monographic 71 pages : illustrations ; 20 cm Their magic tree house takes Jack and Annie to the Arctic, where a polar bear leads them onto very thin ice. N 570 Lexile N Raz-Plus by Mary Pope Osborne ; illustrated by Sal Murdocca "A Stepping Stone book." Polar bear Fiction Bears Fiction Magic Fiction Tree houses Fiction PZ7.O81167 Po 1998 Fic 0679983414 (lib. bdg.) 9780590706384 DLC 20250722111341.0 1021 eng