Children of the Veil by Colleen Halverson

Elizabeth Tanner has one goal: to find her mother in whatever dimension she’s imprisoned. But to do that, she has to face her estranged father, and to do that, she needs a shot of whiskey…or seven. But after an attempt on her life and the return of her lost love, she wakes up with one hell of a hangover and a whole barrage of questions.

Finn O’Connell doesn’t know why the Fianna want him to aid Elizabeth in her search, but he’ll take any excuse to be near her again. Together, they dive headlong into the shadows of her mother’s secrets and find themselves embroiled in a Fae rebellion that will test Finn’s loyalties and their love.

With the Faerie realm verging on chaos, Elizabeth and Finn will embark on a quest that will lead them from the streets of Chicago to London’s seedy Fae underground. But rescuing Elizabeth’s mother means journeying to a place Finn can’t follow, and Elizabeth is forced to make a choice between finding her at last or saving her own soul.