The Changeling's Ghost (Thirteen Gates #1)

Asher Northcott has always been struggling to earn his parents appreciation in their world where protecting the human world from the world of the fae is normal. Due to "recent events" he thought he finally might have that chance. Only to have that dream thoroughly crushed upon discovering an agent from America is being sent to deal with their misconduct of the rules. Asher however is still determined to show he can do anything this guy can do, better. For his sake and his family's.

Gus Washington isn't used to having real friends. The closest thing he has to even a mom is the special agent who looks after him. He spends most of his time karate-chopping faeries and keeping the land of the free and home of the brave pest free. He thought this would be like every other mission he's ever been on, get in, kick butt, get out. Keep moving. Get used to new faces. Then keep moving. However, when it starts to look like it might be different this time, Gus starts to worry that between his loyalty to his job and his own heart, he might loose the first person he ever called a friend.