I've heard great things about these stories. I don't really know much about them. From the info on Wikipedia, I gather they are a bunch of related short stories rather than novels.
I was looking at my local library online to try to get an anthology, but it's a vicious labyrinth to find a good anthology. Some look like they might have "fan fiction" from other authors, and other craziness.
Can anybody point me to a good source of what books/stories there are, what order they should be read (if it matters), or a good anthology that has them compiled well?