Kass, Mallory <br/><br/>
The black book of buried secrets / 
written by Mallory Kass ; introduction by Rick Riordan. 
 - New York :  Scholastic,  c2010. 
 - 188 p. : col. ill. ; 23 cm. 
 - The 39 clues .
<br/><br/><label>ISBN: </label>9780545285049