Osborne, Mary Pope. <br/><br/>
Sea monsters  a nonfiction companion to Dark day in the deep sea 
Mary Pope Osborne 
 - 1st ed. 
 - [S.l.]  Random House  2008 
 - 121 p. 
 - Magic tree house research guide .
 - Magic tree house research guide .
<br/><br/><label>ISBN: </label>9780329646653 (Follett bdg.) 9780375846632 (trade) 9780375946639 (lib. bdg.)