But then there are books that only YOU read. Instructional manuals for fly-fishing. How-to books for spinning yarn. How to cook the perfect souffle. Rebuilding car engines in three easy steps. Dog training for dummies. Rewiring your house without electrocuting yourself. Tips on how to build a NASCAR course in your backyard. Stuff like that.
What niche books do YOU read?
Interesting question. My answer would have to be travel guides. At the moment, I'm reading travel guides to Italy. I'm planning a trip and am currently obsessed with finding out as much information as I can. That being said, I can guarantee it will be a short lived obsession, like everything else. I don't have a long term niche. I flit around from passion to passion.
In the past fifteen years or so I can list a few niche books that I've read. I have a stack of books on Hawaii. When I went a few years ago I knew everything about the islands. I have a good collection of books on tropical fish because when I bought my aquarium I wanted to be well educated. I have books on dog training but I've never focused on them.
I don't think that reading travel guides is at all unusual though. I wish I had a better answer!