Modern Faerie Tales series by Holly Black

Tithe

Sixteen-year-old Kaye is a modern nomad. Fierce and independent, she travels from city to city with her mother's rock band until an ominous attack forces Kaye back to her childhood home. There, amid the industrial, blue-collar New Jersey backdrop, Kaye soon finds herself an unwilling pawn in an ancient power struggle between two rival faerie kingdoms - a struggle that could very well mean her death.
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Curse Workers series by Holly Black

White Cat

Cassel comes from a shady, magical family of con artists and grifters. He doesn't fit in at home or at school, so he's used to feeling like an outsider. He's also used to feeling guilty; he killed his best friend, Lila, years ago. But when Cassel begins to have strange dreams about a white cat, and people around him are losing their memories, he starts to wonder what really happened to Lila. In his search for answers, he discovers a wicked plot for power that seems certain to succeed. But Cassel has other ideas and a plan to con the conmen.
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