Chapter 7: (read-string ("+"))

[boolpath]

This line: https://github.com/flyingmachine/brave-clojure-web/blob/master/content/cftbat/read-and-eval.html#L238

Extra parens around "+":

(read-string ("+"))
; => +

Instead, it should be:

(read-string "+")
; => +

Amazing chapter! And very useful tree images.