[iafisher]

I read this book about a year ago and later wrote another Lisp [1] from scratch but based on the design in the book. It's still one of my favorite computer science books. He covers quite a range of topics (C programming, traditional Lisp stuff, some other functional programming topics like currying) and the quality is superb. One thing the Lisp interpreter described in the book lacks (if I recall correctly) is a proper garbage collector, which can be an interesting extension to the project if you're up for a challenge.

[1] https://github.com/iafisher/scam