>Well I'm saying the two things a person needs to learn Clojure are the practices already described in four decades of Lisp's literature and the Clojure interop.

I agree. However, the Lisps all have subtle differences. For example, Clojure's interop is one difference, but it's not the only difference. These subtle differences still need to be explained in that Lisp's context to receive a full understanding of that Lisp. This is what I feel nonrecursive has achieved with his writing about FP in Clojure.