I am not jet finished reading this book, so maybe later I shall have some additional comments. The book is very old (copyright 1993), but it is valuable asset for professional programmer.
This book is the best example of the rule "the more you know the better is your benefit of reading a book". For example, although book does not deal with object oriented programming (as far as I read till now), even if you are professinal programmer who is in object programming you will get something that you very probably missed - a lot of important and fine details that will help you be a better programmer in object world. It is very hard to explain the profit you get with this book, but it is: you get your knowledge of coding polished to the maximum.
To return to the example of OOP (object oriented programming) this book will tell you about the cohesion of your methods (the book calls them traditional names, routines) and sorts of coupling; everything is the pure ground for OOP but from the perspective of traditional programming; even in OOP books you cannot find easily such explanations, and that done in traditional programming.
If you are a beginner, this book will show you how to name the routines and variables, will show you that statistically short routines of say 20 lines are more prone to errors per line of code than routines of 100 lines! Anyway, I do not want to spoil the pleasure of reading the book: don't expect too much from it, but if you are a brilliant programmer who appreciate precision and polishing of your knowledge, you will be on a right track if you choose this book.