There are certain types of books that I more or less assume all readers read. (Novels, for example.)
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?
I love to browse through crafty type books and quilt books. But I haven't done it for a long time. The craft and quilting mood seems to have left me awhile back. I'm hoping it will hit again soon. I really miss it.
In the past, I've been known to enjoy decorating books and landscaping books. It's been awhile for those too.
I really like books about castles in Great Britain. That's fairly "nichey", right? I've got a bunch of them on the shelf. And if there's a ghost story to go along with, that makes it even better.
Oh, and of course cookbooks.... "baking" books to be specific.
That's about all I can think of at the moment.