"Lisp in Small Pieces" is very well-written. It will teach you a lot about how to compile (subsets) of Scheme. If you decide to compile a Pascal-like language,

"Lisp in Small Pieces" is very well-written. It will teach you a lot about how to compile (subsets) of Scheme. If you decide to compile a Pascal-like language, I can't recommend "Brinch Hansen on Pascal Compilers" enough. If I remember correctly the Pascal compiler described in the book can compile itself.