Mansions of Darkness : A Novel of Saint-Germain
By Chelsea Quinn Yarbro, 1996
Series: Saint-Germain Chronicles

Ninth of the Saint-Germain novels. "Beginning in Peru, San Germanno becomes the lover of Acanna Tupac, one of the few remaining Incan nobility. When he falls under suspicion from the Church, he flees northward, finally arriving in Mexico where a terrible ordeal awaits him at the hands of the Dona Azul." (summary from the Chelsea Quinn Yarbro site)

Paperback Info: ISBN 0312863829, Tor Books

More by Chelsea Quinn Yarbro: The Olivia Series, Sisters of the Night