Paranormalcy by Kiersten White

Weird as it is working for the International Paranormal Containment Agency, Evie’s always thought of herself as normal. Sure, her best friend is a mermaid, her ex-boyfriend is a faerie, she's falling for a shape-shifter, and she's the only person who can see through paranormals' glamours, but still. Normal. Only now paranormals are dying, and Evie's dreams are filled with haunting voices and mysterious prophecies. She soon realizes that there may be a link between her abilities and the sudden rash of deaths. Not only that, but she may very well be at the center of a dark faerie prophecy promising destruction to all paranormal creatures.