Shadow Moon (Unbidden Magic #4)

Allie Emerson is hoping for a few quiet months to catch her breath after a summer that included the discovery she is not only a twin and of faery blood, but also destined to play a pivotal role in faery world. School has barely begun when Allie must kiss her hope of a normal year goodbye.
She can't escape her unfinished business with the fae, the Trimarks, or Junior Alvarez, who is making it clear he plans to win her back. Signs, portents and whispers are pushing Allie to "find the girl" before it's too late. Hoping her twin can help her solve the riddle of their destiny, Allie uncovers old secrets and begins a cross-country journey that puts her in more danger than ever before. If she succeeds, she may just find the answers that can save everyone she loves.
Marilee Brothers is a former high school teacher turned full-time author. She married her college crush, and they have three sons. Marilee lives in Washington State, where she's hard at work on the next book in the Unbidden Magic series. www.MarileeBrothers.com