War for the Oaks by Emma Bull

[Jessica]

"Eddi McCandry has just left her boyfriend and their band when she finds herself running through the Minneapolis night, pursued by a sinister man and a huge, terrifying dog. The two creatures are one and the same: a phouka, a faerie being who has chosen Eddi to be a mortal pawn in the age-old war between the Seelie and Unseelie Courts. Eddi isn't interested--but she doesn't have a choice. Now she struggles to build a new life and new band when she might not even survive till the first rehearsal. "