Tony Stark, Victor von Doom, T'Challa, Amadeus Cho... the greatest minds in the Marvel Universe all have one thing in common: they're not smarter than a 4th grader! Lunella Lafayette is the smartest there is - and her brain is matched by Devil Dinosaur's brawn! They'll need both to stand up to some of the worst villains the world has to offer - and maybe even one of its greatest heroes! Because while Reed Richards, the guy who used to be the cleverest of all, is away, his best pal Benjamin J. Grimm is here to defend his pole position! Then, Lunella has her biggest adventure yet - a journey to the Living Planet! But are you ready for Moon Girl to meet... Girl-Moon? And who exactly are Devil Girl and Moon Dinosaur?!