Totally taken in by this part of the Goodreads description: 
 "Department 19 takes us through history, across Europe, and beyond - from the cobbled streets of Victorian London to prohibition-era New York, from the icy wastes of Arctic Russia to the treacherous mountains of Transylvania. Part modern thriller, part classic horror, it's packed with mystery, mayhem, and a level of suspense that makes a Darren Shan novel look like a romantic comedy."