@underlvr:
For gay mystery/detective/p.i. books you might consider Mark Richard Zubro, Joseph Hansen, Robert Innes, Gyles Brandreth, Frank W. Butterfield, Greg Herren, Richard Stevenson, R.D. Zimmerman, Dorien Grey, Josh Lanyon, Anthony Bidulka, Neil S. Plakcy, Lev Raphael, James Buchanan, Victor J. Banis, Orland Outland, Mark McNease, and Michael Nava. Duncan Andrews combines mystery and sci-fi in his books. Christopher Rice is a good author in the sci-fi/paranormal genre. One female writer that I felt was good in the gay detective genre is Charlie Cochrane.
Josh Lanyon is a straight woman.