The Thirteenth Pillar (Paperback, New edition)

"A Section Thirteen story. Sequel to The Thirteenth Child"
Tuulois MacColewyn's simple life performing dirty jobs for fey hiding in New York City has died a quick death. Consulting for the NYPD on a case involving child abductions, losing a friend, laying siege to a stronghold at the end of Broadway, and being chased through a hospital by animated scarecrows combined to make last month hell. This month is shaping up to be much worse.
Yet, it's not "all" bad. Cole has a new place to live, a steady-paying job working for the NYPD, and the heart of Inspector Joss Vallimun, head of Section Thirteen and, incidentally, Cole's new boss.
Section Thirteen is under-staffed and over-worked, trying to solve every supernatural crime in New York, including a series of grisly child murders and evidence that local fey are being enslaved. When Vallimun is gravely injured just as the investigation reaches a fever pitch while a snowstorm blankets the city, Cole will need all the help he can get to have any hope of salvaging this month at all.