Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers Colour (Book 10)

Laugh out loud with Captain Underpants, from Dav Pilkey,
the creator of Dog Man!
The Radioactive Robo-Boxers are back
in the tenth full colour book in this #1 New York Times
bestselling series.

When we last saw our heroes, George and Harold, they had been
turned into evil zombie nerds doomed to roam a devastated,
postapocalyptic planet for all eternity. But why, you
might ask, didn't the amazing Captain Underpants save the boys from
this frightening fate? Because Tippy Tinkletrousers and
his time-traveling hijinks prevented George and Harold
from creating Captain Underpants in the first place! Now, having
changed the course of human history forever, they'll
have to figure out a way to change it back!