Department 19 (Department 19, Book 1)

In a secret supernatural battle that's been raging for over a century, the stakes have just been raised — and they're not wooden anymore.
DEPARTMENT 6 IS THE ARMYDEPARTMENT 12 is MI5DEPARTMENT 19 IS THE REASON YOU’RE ALIVE
When Jamie Carpenter's mother is kidnapped by strange creatures, he finds himself dragged into Department 19, the government's most secret agency.
Fortunately for Jamie, Department 19 can provide the tools he needs to find his mother, and to kill the vampires who want him dead. But unfortunately for everyone, something much older is stirring, something even Department 19 can't stand up against…