Just the start of it all

The Case of the Imaginary Detective by Karen Joy Fowler

I have literally just finished this two seconds ago. It's all about the intersections between fiction and reality, and writers and fandom, and the real world and online (and also a whole bunch of stuff about mad cults) and basically if you're reading this post, then it's pretty much guaranteed to be at least somewhat Relevant To Your Interests. It's very funny in places and very moving in others.