Osborne, Mary Pope <br/><br/>
Blizzard of the Blue Moon. 

 - New York :  Random House,  c2006. 
 - 110 p  illus  22 cm 
<br/><br/> The magic tree house carries Jack and Annie to New York City in 1938 on a mission to rescue the last unicorn. 
<br/><br/> K-3 
<br/><br/><label>ISBN: </label>0375830375 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time travel - fiction<br/>Magic -fiction<br/>Unicorns - fiction<br/>Depressions - 1929 - fiction<br/>Tree houses - fiction<br/>Brothers and sisters - fiction<br/>New York (N.Y.) - History - 1898 - 1951 - fiction