Paul Hudak
Good book on haskell. I grabbed it off amazon a while ago, but it took me a while to get to it. And I just read the book, didn’t do many of the exercises due to the fact that I was reading it to eat time on the soccer bus mostly. I’m kind of mad that Hudak spends so much time on writing an elementary graphics system, because the book is pegged as a kind of multimedia tutorial in haskell, and of all the media that there are graphics is the least interesting to me. It’s got some nice chapters later on about music though, and I actually understand what first class functions are now. (Ruby doesn’t have them, although the constructs available to you there do make a huge difference coming from a language like java, and are fairly powerful.)