Osborne, Mary Pope. <br/><br/>
Dragon of the Red Dawn / 
by Mary Pope Osborne. 
 - New York, NY :  Random House,  2007. 
 - p.  cm. 
 - Magic tree house ; 37 .
<br/><br/> Summary: When Merlin is weighed down by sorrows, Jack and Annie travel back to feudal Japan to learn one of the four secrets of happiness. 
<br/><br/><label>ISBN: </label>978-0-375-83727-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time travel--Fiction<br/>Magic--Fiction<br/>Brothers and sisters--Fiction