Title: Agyar
First published: 1993
Description: From back cover Tor paperback March 1994:

[Agyar], a suave and mysterious drifter who shares an abandoned house with a compassionate African-American ghost, spends his nights seducing various inhabitants of an Ohio college town.  Few can resist him, but he eventually finds himself obsessed with two women, one a beautiful young dancer, the other a harsh taskmistress of indeterminate age.  One offers him salvation, the second seeks to destroy him...
Subjects: Immortalism, Fiction, Fiction, horror
LC classification: PS3552.R84 A73 1993