I really like his (How to Write a (Lisp) Interpreter (in Python)) : http://norvig.com/lispy.html http://norvig.com/lispy.html You learn to build a lisp interp

I really like his (How to Write a (Lisp) Interpreter (in Python)) : http://norvig.com/lispy.html http://norvig.com/lispy.html You learn to build a lisp interpreter in about 100 lines of python (you miss a few features like macros, but it's still quite complete). Very nice to learn how language interpretation works