Thankfully chapter 4 demonstrates how to do just that! Want to make it lazy like Haskell? Syntax different from Scheme? You are limited only by your imagination. Round that off with the last chapter from Let Over Lambda and you can add in "or make it like Forth"!
One thing i wonder though: i first wanted to code that lisp in haskell (learning two languages in one), but i'm not quite sure it's such a good idea, now that i've learned about homoiconicity.
