The following example (based on page 173's let vs binding examples, doesn't work with the version of clojure (1.1.0-alpha) that is included in the book repo

(def foo 10)

(defn printfoo [] (println foo))

(printfoo)

(binding [foo "bound foo"] (printfoo))

expected out put: "10" "bound foo"
what you get is: "10" "10"
clojure 1.0 (from clojure.org) works fine