Very cool. I'm happy you're doing this. Greetings from #clojurewest by the way! Yo, I have not gone through all the pages yet, but I'm hoping you jump to map/filter/reduce and show how they are the intelligent and amazing alternative (replacement?) to for-loops and the like. A non-obvious bit of knowledge that is vital to FP.
I do discuss map/filter/reduce, but not in comparison to for-loops, as the book presumes that FP is the only thing there is (analogous to how imperative language books don't mention they are great replacements for assembly language). I just realized today that I don’t have anything about list comprehensions, and I may want to add a page on that topic.