The Other Side of the Story: The Treasure Thief

Every story has two perspectives, but sometimes the other one is something we don't want to know.
Before the SandWing War of Succession, a SkyWing named Kite discovers her brother Treeline is sick. Nobody knows what he's sick with, and nothing seems to help. Kite gets an idea, but it's a risky one. It involves trusting dragons that maybe shouldn't be trusted and making choices that might haunt Kite for the rest of her life. It also makes Kite wonder what lengths she'll go to to save her brother.
The dragon on the cover is Kite.
This book is a fanfiction of Tui T. Sutherland's series "Wings of Fire."