The Darwath Trilogy
Gil knew that it was only a dream. There was no reason for her to feel fear — she knew that the danger, the chaos, the blind, sickening nightmare terror that filled the screaming night were not real; this city with its dark, unfamiliar architecture, these fleeing crowds of panic-stricken men and women who shoved her aside, unseeing, were only the vivid dregs of an overloaded subconscious, wraiths that would melt with daylight.
She knew all this; nevertheless, she was afraid.
I'm not a horror fan, but I make an exception for Barbara Hambly, whose fantasy novels do tend to be touched with horror (more than touched, sometimes). But I enjoy her writing so much — her style, her people — that, well, all I can say is that despite my avoidance of horror, she's one of my favorite writers.
The Darwath Trilogy was, much to my delight, followed by two others: The Mother of Winter, and The Icefalcon's Quest
She's also written (well, a lot actually, and I love them all!) a couple of vampire riffs: Those Who Hunt the Night and Travelling with the Dead
