Pilkey, Dav,  1966- <br/><br/>
Captain Underpants and the revolting revenge of the radioactive robo-boxers :  the tenth epic novel / 
by Dav Pilkey. 
 - New York :  Scholastic,  c2013. 
 - 216 p. :  ill., music ;  22 cm. 
<br/><br/> George and Harold are forced to contemplate a world without Captain Underpants. 
<br/><br/><label>ISBN: </label>9780545175364 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Captain Underpants (Fictitious character)--Juvenile fiction.<br/>Time travel--Juvenile fiction.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Humorous stories.
<br/><br/><label>Dewey Class. No.: </label>813.6