The Faerie Guardian

Enter a hidden world of magic, mystery, action and romance ...
Seventeen-year-old Violet Fairdale has one job: protect humans from dangerous magical creatures. It's a job she's good at—until her latest assignment, a cute human guy who can somehow see through her faerie glamour, follows her into the fae realm. Now she's broken Guild law and risked her future as the top graduate of her class.
The last thing Vi wants to do is spend any more time with the guy who got her into this mess, but the Guild requires that she return Nate to his home and make him forget everything he's discovered of the fae realm. Easy, right? Not when you factor in evil faeries, long-lost family members, and inconvenient feelings of the romantic kind. Vi is about to find herself tangled up in a dangerous plot—and it'll take all her training to get out alive.
Perfect for fans of The Mortal Instruments, The Iron Fey, and Graceling.