Keith R.A DeCandido is an author to many of the tie in novels for the Supernatural series. He was born and raised in New York City to a family of Liberians. He has written over fifty novels for a dozen different media universes some include novels for Star Wars,Star Trek,Doctor Who, etc.
DeCandido was also the one who wrote and published the very first Supernatural novel Nevermore. Interestingly the novel is set where DeCandido grew up, in the Bronx. It can be guessed that he made that the primary setting because he knew the most about his home city.