Osborne, Mary Pope. <br/><br/>
Polar bears past bedtime / 
by Mary Pope Osborne ; illustrated by Sal Murdocca. 
 - New York :  Random House,  c1998. 
 - 71 p. :  ill. ;  20 cm. 
 - Magic tree house ;  #12 .
 - Osborne, Mary Pope.  Magic tree house series ;  #12. .
<br/><br/> "A Stepping Stone book." 
<br/><br/> Their magic tree house takes Jack and Annie to the Arctic, where a polar bear leads them onto very thin ice. 
<br/><br/> "RL: 2.1"--Cover p. [4]. 
<br/><br/><label>ISBN: </label>0679983414 (lib. bdg.) 067988341X (pbk.) 
<br/><br/><label>LCCN: </label>97015624  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Polar bears--Fiction.<br/>Bears--Fiction.<br/>Magic--Fiction.<br/>Tree houses--Fiction.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Arctic regions--Fiction.
<br/><br/><label>LC Class. No.: </label>PZ7.O81167  / Po 1998 
<br/><br/><label>Dewey Class. No.: </label>