One of my favorite recent authors in the Gay Mystery field is David Pederson. His detective, Heath Barrington, is a gay man in post-World War II Milwaukee. It's filled with fun stuff from that era, as well as the conflict of the closet during an era, and in a profession, where there is no alternative.
Start with Death Comes Darkly, a Agatha-Christie-esque mystery. The murder takes place in a confined space, so the suspects are a known quantity. This is a classic mystery and a classic gay novel. A great start ot series. Read this, and you are hooked for the next two (and a third due out soon).
And a little bit about the author....from his website:
I am not by nature a morning person, but have become more of one as life requires. I love black coffee, red wine, dark chocolate, and a good dirty vodka martini with blue cheese stuffed olives. These are the reasons I go to the gym four times a week, lol. I met my husband country dancing, and after 22 years of being together, we were finally able to get married, something I never thought would happen.
We love to travel, to experience new things, new cultures, and new people. The world, though small, is still large; a paradox, and I want to see as much of it as I can. Time speeds by, so whenever possible I don't put off until tomorrow.
I'm very open minded and I try not to judge others. I'm open to new things and new adventures, and I love meeting new people and hearing their stories.
I’m fascinated by the past, and feel it is our gateway to the future. I believe in compassion, love, and kindness, always.
I feel life should be more like an MGM musical, and I frequently burst into song and sometimes dance, often much to the chagrin of my husband and friends. I believe in happy endings, and strive always to make it so.
Three things very important to me: our environment and habitat, prevention of cruelty to animals, and advancement in medical science.
I rescue earthworms off the sidewalk, catch and release spiders in the house, and always try to be kind to all creatures great and small
I'm extremely organized and very anti-clutter. I try not to put a lot of stock in material possessions, preferring instead to accumulate memories and friendships.