Pilkey, Dav  1966 <br/><br/>
Captain Underpants and the preposterous Pligth of the purple potty people  The Eighth epic novel 
Dav Pilkey 
 - ed. 
 - New York  Scholastic  2006 
 - 172 p. 
<br/><br/><label>ISBN: </label>9781407103600