Pilkey, Dav,  1966- <br/><br/>
Captain Underpants and the preposterous plight of the purple potty people :  the eighth epic novel / 
 Captain Underpants & the preposterous plight of the purple potty people 
by Dav Pilkey. 
 - New York :  Scholastic,  c2006. 
 - 172 p. :  ill. ;  20 cm. 
<br/><br/> George and Harold hypnotize their principal who, believing he is the superhero Captain Underpants, leads them to the lair of the nefarious Dr. Diaper.  They must then defeat his evil robot henchmen. 
<br/><br/> 850  Lexile. 
<br/><br/>
<br/><br/><label>ISBN: </label>9780439376143 9780756972332 9780545385749 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School principals--Juvenile fiction.<br/>Heroes--Juvenile fiction.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Humorous stories.
<br/><br/><label>Dewey Class. No.: </label>741.5/973