Osborner, Mary Pope <br/><br/>
Eve of the Emperor Penguin / 
by Mary Pope Osborn. 
 - New York :  Random House,  2008. 
 - 109 p. 
<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>978-0-375-83733-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tree houses--Fiction<br/>Voyages and travels--Fiction<br/>Magic--Fiction<br/>Brothers and sisters--Fiction<br/>Antartica--Fiction