Black Sun Rising by C. S. Friedman (1994, Paperback, Reissue)

This book mixes Sci Fi with Fantasy. It is an exploration of good and evil. It exposes the fact that sometimes evil can be good and yes good can take advantage of evil for good. It was written by someone who is great at bringing out characters deepest feelings and fears and expressing very well how they overcome those fears. The technology and use of magic is explored and documented well. This first book in the series is very strong. The whole series is a great read and will leave you wanting more of this genre.