William Alexander 
Nomad 

Gabe Fuentes is in a race against timeand aliensin this intergalactic sequel to Ambassador, which Booklist called an exciting sci-fi adventure, perceptively exploring what it means to be alien, from National Book Award winner William Alexander.When we last left Earths Ambassador, Gabe Fuentes, he was stranded on the moon. And when hes rescued by Kaen, another Ambassador, things dont get better: It turns out that the Outlast a race of aliens that has been systematically wiping out all other creaturesare coming. And theyve set their sights on Earth. Enter Nadia. She was Earths Ambassador before Gabe, but left her post in order to stop the Outlast. Nadia has discovered that the Outlast can conquer worlds by travelling fast through lanes created by the mysterious Machinae. No one has communicated with the Machinae in centuries, but Nadia is determined to try, and Gabe and Kaen want to help her. But the three Ambassadors dont know that the Outlast have discovered what they are doing, and have sent assassins to track them down. As Nadia heads deeper into space to find the Machinae, Gabe and Kaen return to Earth, where Gabe is trying to find another type of alienhis father, who was deported to Mexico, and who Gabe is desperate to bring home. From a detention center in the center of the Arizona desert to the Embassy in the center of the galaxy, the three Ambassadors race against time to save their worlds in this exciting, funny, mind-bending adventure.