Night Creatures by Jeremy Jordan King
It’s 1981, and Bryant thinks his move to New York will be the beginning of a new life. But the men he meets are being threatened by a mysterious illness. Could transforming into a Night Creature save him and his loved ones from certain death? Book Two of Immortal Testimonies travels back in time to the gay community’s darkest days.
Here's the synopsis of book one, In Stone: A Grotesque Faerie Tale Add your review of "Night Creatures" in comments!