Fun Author Tool

I discovered a new, fun little tool online (sorry, but I can't remember who I found it from!). Its the Literature Map and it creates a map/chart of authors. According the web site, "the closer two writers are, the more likely someone will like both of them." Above is a screen shot of the map for Italo Calvino (one of my favorite authors). I get why Jorge Luis Borges is nearby, but I'm less clear on how James Frey ended up so close as well. Unfortunately, there's no explanation of the methodology that I could find, which is a little annoying. Then again, we're not trying to solve the world's problems, just to find a good book, so I guess that's okay!