Pilkey, Dav <br/><br/>
Captain Underpants and the Terrifying Return of Tippy Tinkle Trousers #9 :  The Ninth Epic Novel. 

 - New York, NY :  Scholastic,  2012. 
 - 310 
<br/><br/>
<br/><br/><label>ISBN: </label>978-0-545-17534-0