Osborne, Mary Pope. <br/><br/>
Heroes for all times  a nonfiction companion to Magic tree house #51: High time for heroes 
Mary Pope Osborne 
 - ed. 
 - [S.l.]  Random House  2014 
 - 120 p. 
 - Magic Tree House fact tracker .
 - Magic Tree House fact tracker .
<br/><br/><label>ISBN: </label>9780375870279 (pbk.) 9780375970276 (lib. bdg.) 9781489805034 (Follett bdg.)