Osborne, Mary Pope. <br/><br/>
Eve of the Emperor penguin  
by Mary Pope Osborne ; [illustrations by Sal Murdocca] 
 - 1st ed. 
 - New York :  Random House,  2008. 
 - 109 p. :  ill. ;  22 cm. 
 - Magic tree house ;  40. .
<br/><br/> The magic tree house takes Jack and Annie to Antarctica to search for the fourth secret of happiness for Merlin. 
<br/><br/><label>ISBN: </label>9780375837333 (trade)  11.99 0375837337 (trade) 9780375937330 (lib. bdg.) 0375937331 (lib. bdg.) 9780375837340 (pbk.) 0375837345 (pbk.) 
<br/><br/><label>LCCN: </label>2008005769 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tree houses--Juvenile fiction.<br/>Voyages and travels--Juvenile fiction.<br/>Magic--Juvenile fiction.<br/>Brothers and sisters--Juvenile fiction.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Antarctica--Juvenile fiction.