I bought this as an e-book a while ago - I had never spent very much time coding Javascript and I bought the book to brush up. Recommended. BTW, I spent the weekend working on a Clojure + Javascript + Noir app for a customer and I actually enjoyed the Javascript part :-)
I have only played a bit with ClojureScript, not enough to have a real opinion. I think I will wait a while until it is in an API stable state and there are tools for auto building assets, etc.