This will be short today. Let the Words Flow is having a giveaway. It is the book Paranormalcy, by Kiersten White.
Summary (from Amazon.com):
Evie’s always thought of herself as a normal teenager, even though she works for the International Paranormal Containment Agency, 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 Evie’s about to realize that she may very well be at the center of a dark faerie prophecy promising destruction to all paranormal creatures.
So much for normal.