Osborne, Mary Pope. <br/><br/>
Eve of the emperor penguin / 
by Mary Pope Osborne ; illustrated by Sal Murdocca. 
 - 1st ed. 
 - 109 pages :  illustrated;  20 cm. 
 - Osborne, Mary Pope.  Magic tree house series ;  40. .
<br/><br/> ""A Merlin mission."" 
<br/><br/> The magic tree house takes Jack and Annie to Antarctica to search for the fourth secret of happiness for Merlin. 
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<br/><br/><label>ISBN: </label>9780545235211 0545235219 9780545232517 0545232511 9780545232517 
<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.