Collins, Suzanne <br/><br/>
Gregor and the marks of secret.  Underland Chronicles, Book 4 / 
Suzanne Collins 
 - New York :  Scholastic,  2013 
 - 344 p.  21 cm 
 - Underland chronicles, 4. .
<br/><br/><label>ISBN: </label>978-0-439-79146-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Imaginary wars and battles--Juvenile fiction.