It was a product of its time I guess, much better ones from similar vintage,

The Tiger book (with C, Standard ML, and Java variants)

https://www.cs.princeton.edu/~appel/modern/

Compiler Design in C (freely available nowadays, beware this is between K&R C and C89)

https://holub.com/compiler/

lcc, A Retargetable Compiler for ANSI C

https://drh.github.io/lcc/

Or if one wants to go with more clever stuff,

Compiling with Continuations

Lisp in Small Pieces