Summer Bound — Melissa Marr

After centuries of frolicking as a Summer Girl, Siobhan isn't sure she's ready for her new life. Promoted to Summer Court advisor alongside Tavish, Siobhan suddenly has responsibilities and a chance at romance--until she and Tavish are at odds as they help guide their queen through a life-changing revelation.Aislinn, former mortal and current Summer Queen, thought she'd already faced the most difficult obstacles fate could throw her way:  losing her humanity, becoming a queen, loving someone who spends fifty percent of his time in another world, and facing the embodiment of war. None of that is as shocking as what Ash learns when the former Dark King, Irial, arrives at her door.No one is prepared for a secret that could challenge the delicate balance between the Faery Courts.