The Never War, Volume 3 - D. J. Machale

It sure looks like Earth, but 15-year-old Bobby Pendragon, a Traveler, is not so sure. After following his uncle on a mission to save the world, Bobby has returned to Earth--only it's 1937 and the 21st-century protagonist is a little out of his depth. \nThe third installment in an epic series of adventures \n First Earth \n Fourteen-year-old Bobby Pendragon is a loyal friend, sports star, devoted pet owner -- and Traveler. Along with his uncle Press, Bobby has visited the alternate dimension of Denduron and participated in a civil war. He's also waded through the endangered underwater territory of Cloral. Now Bobby once again finds himself thrust beyond the boundaries of time and space into a place that seems somewhat familiar: First Earth. \n Bobby and the Traveler from Cloral -- Spader -- have flumed to New York City, 1937. Against a backdrop of gangsters, swing music, and the distant sound of a brewing war, the two must uncover the evil Saint Dane's newest plot. But is Bobby ready for the difficult choices ahead?