Hugo and Flynn are your guides to the hidden secrets of Air and Earth: two of the vital Elements that make up the incredible world of the Skylanders. Featuring stories, trivia and bags of information on Skylands heroes including Free Ranger, Pop Thorn, Rubble Rouser and Slobber Tooth, as well as old favourites such as Jet-Vac and Terrafin. This is the fourth release from the highly collectible Skylanders Book of Elements series. Complete the set with Magic & Tech, Fire & Water and Life & Undead.