I fully agree, and there are already great books for easily entering those worlds: Scheme: The Little Schemer (a classic) Common Lisp: Land of Lisp (a truly

I fully agree, and there are already great books for easily entering those worlds: Scheme: The Little Schemer (a classic) Common Lisp: Land of Lisp (a truly remarkable, quaint book: learn Common Lisp by programming classic games; full with really funny cartoons.) Practical Common Lisp (really excellent way to learn quickly, modern. Freely available.)