I've let the book sit for a month so that I could approach a final edit with something of a fresh eye. Starting tomorrow, I'll start working through it, spending about two hours a day (as a normal reader might). I anticipate only smallish changes, so this will be the last edit (save for errata) until I consider the book officially done.
If you'd like to contribute suggestions, etc., please do.
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Occasional consulting on programming technique
Contract programming in Ruby and Clojure
Latest book: /Functional Programming for the Object-Oriented Programmer/
https://leanpub.com/fp-oo