rec me novels with a gay male protagonist!

A friend of mine was complaining today that he couldn't find any good novels where the main character was (like him) a gay guy. I read very little published fiction, and he doesn't read fanfic, so I couldn't help. But maybe you can!

He doesn't like paranormal stuff (no werewolves or vampires, he specified) nor is he looking for erotica/romance. Beyond that I think he's open to different genres.

Where should I point him?

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