A river of golden bones / A. K. Mulford.

"A young heir begins a journey of self-discovery, romance, and adventure as she comes out of hiding to save her sister from a malicious, powerful sorceress and her dangerous sleeping curse…A sleeping curse. A fallen court. A secret twin. Twins Calla and Briar have spent their entire lives hiding from the powerful sorceress who destroyed their kingdom…and from the humans who don’t know they are Wolves. Each twin has their own purpose in life: Briar’s is to marry the prince of an ally pack and save the Golden Court. Calla’s purpose is to remain a secret, her twin’s shadow . . . the backup plan. No one knows who Calla truly is except for her childhood friend—and sister’s betrothed—the distractingly handsome Prince Grae. But when Calla and Briar journey out of hiding for Briar’s wedding, all of their well-made plans go awry. The evil sorceress is back with another sleeping curse for the last heir to the Golden Court. Calla must step out of the shadows to save their sister, their kingdom, and their own legacy. Continuing to hide as a human and denying who she truly is, Calla embarks on a quest across the realm, discovering a whole world she never knew existed. Outside the confines of rigid Wolf society, Calla begins to wonder: who could she be if she dared to try?"--Publisher's website.