I haven't read that one yet, but "Algorithms + Data Structures = Programs" is just an absolutely beautiful gem of a book. It embodies his principles of simplicity and clarity. Even though it's outdated in many places, I adored reading it.
Speaking of which, that book is one of the very few sources I could find that talks about recursive descent error recovery and goes further than panic mode.
There's also an interesting book "A model implementation of standard Pascal" - not by Wirth - that implements an ISO Standard Pascal compiler in Standard Pascal, written as a "literate program" with copious descriptions of every single aspect. Basically, the entire book is one large program in which non-code is interspersed as very long multiline comments.
compiler.pas can be compiled with a modern Pascal compiler, but the resulting compiler cannot compile itself. I don't know if that's caused by a transcription error, a bug in the modern compiler or a bug in the Model Implementation.
I would love it if somebody gets this working. I don't think I myself will continue with this project.
