If you need functional background, you could try SICP - there is also a clojure version being developed. I took an Ocaml course on my uni 'strongly inspired' by

If you need functional background, you could try SICP - there is also a clojure version being developed. I took an Ocaml course on my uni 'strongly inspired' by SICP and I must say that it pretty much rewired my brain for functional.