Pilkey, Dav <br/><br/>
Captain Underpants and the Perilous Plot of Professor Poopypants #4 :  Fourth Epic Novel. 

 - New York, NY :  Scholastic,  2000. 
 - 153 
<br/><br/>
<br/><br/><label>ISBN: </label>978-0-439-04998-6