Slither

Her revenge is better served cold-blooded. Elanor of Onyx, enslaved by the dragons who scorched her kin and country, is determined to escape her island prison. When the changeling dragon, Adom, demands that Elanor come with him to the mainland on a secret mission, she sees the opportunity she's been waiting for-a chance to exact her revenge. But when his actions take a surprising twist, Elanor begins to suspect that maybe things are not as they seem.
With a plot brewing against the mainland king, alliances are tested and Elanor discovers a secret that will forever change the way she views the slithering dragons-and herself.