Tra-la-laaa! The wait is over! Dav Pilkey--ahem--we mean, George and Harold, the authors of SUPER DIAPER BABY, are back with their second epic novel! Now with super-cool foil covers! Shiny! Fun!Meet Ook and Gluk, the stars of this sensationally silly graphic novel from the creators of Captain Underpants! It's 500,001 BC, and Ook and Gluk's hometown of Caveland, Ohio, is under attack by an evil corporation from the future. When Ook, Gluk, and their little dinosaur pal Lil