[willcipriano]

C snobs don't like this book, but it's free and fun: https://buildyourownlisp.com/

I ended up expanding the project pretty far: https://github.com/willcipriano/Connery

[HexDecOctBin]

Neither C snobs nor Lisp snobs like this book, because it uses bad C techniques to implement Lisp is the most weird way (who uses a hand-rolled Parser Generator to parse Lisp?)