Comment by nils-m-holm

These might be worth a look:

Write Your own Compiler (http://t3x.org/t3x/book.html) - a minimal compiler that translates a procedural language to 386 machine code.

Practical Compiler Construction (http://t3x.org/reload/index.html) - Complete compiler for a subset of C89, compiling to 386, including runtime support.

LISP System Implementation (http://t3x.org/lsi/index.html) - Bytecode generation for functional languages.

Leightweight Compiler Techniques (http://t3x.org, further down on the page) - intermediate languages, some optimization.

All written by me.