Captain Underpants and the preposterous plight of the purple potty people /
the eighth epic novel by Dav Pilkey ; with color by Jose Garibaldi and Corey Barba.
- 172 pages : illustrations ; 20 cm
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- Captain Underpants ; 8 .
- Pilkey, Dav, 1966- Adventures of Captain Underpants ; 8. .
Harold and George's time-traveling Purple Potty lands them in an alternate universe where everything seems delightful, but evil lurks just beneath the surface, and leads to a battle between Captain Underpants and his own evil twin.