GGenius Files 4-Book CollectionGenius Files 4-Book Collectionde Dan GutmanMateriasChildren's fictionAdventure and adventurers, fictionGenius, fictionEdiciones (1)Genius Files 4-Book Collection (2014)HarperCollins Publishers Limited · inglés · ISBN 9780062372789Más obras de Dan GutmanBabe Ruth and the ice cream messBack in Time with Benjamin FranklinBanana bats & ding-dong balls