Beyond World' s End

"When unethical drug researchers discover that they can induce amazing mental powers using psychotropic drugs, ... this gets the attention of Aerune mac Audelaine, lord of the dark Unseleighe Sidhe," and both sides are threatened by the existence of Eric Banyon. Magician-bard Eric Banyon settles in for a quiet life at his new New York apartment, only to discover that his building is a safe house for a group of occultist Guardians assigned to protect the city from supernatural evil