Beautifully typeset (with LaTeX). The only issue is that PDF pages are not the best way to view code on a screen. Code should scroll continuously. For that, I would still recommend the HTML version.
Eric Normand is an experienced functional programmer, trainer, speaker, writer, and consultant on all things FP. He started writing Lisp in 2000 and is now a Clojure expert, producing the most comprehensive suite of Clojure training material at PurelyFunctional.tv. He has a popular newsletter and blog. He also consults with companies to use functional programming to better serve business objectives. You can find him speaking internationally at programming conferences.