Oath of Dragons: A Dragon Rider Epic Fantasy Series (Dawn of the Dragon Riders) by Alex Morgenstern

A land where dragons are hunted and killed. A bloodthirsty emperor. A boy who can change it all. Segir is the village outsider, discarded and scorned by the people around him. Until a dragon lands next to his home and his life is transformed forever. Now, the Empire wants the dragon killed. Segir must gather courage to defend the dragon even if it costs him his life. If he fails, dragons may become extinct forever. Meanwhile, a renegade soldier searches for an ancient relic, one with the power to summon the last dragons and protect his people from slaughter. But the war mages of the Empire are already on their heels, and they have magic and numbers on their side. The fate of the last dragons hangs in balance. Enjoy a fantasy adventure perfect for fans of Eragon and Dragonriders of Pern!