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.
George and Harold are forced to contemplate a world without Captain Underpants.
9780545175364
Captain Underpants (Fictitious character)--Juvenile fiction. Time travel--Juvenile fiction.