One of the best explanations available on how to use macros and conditional compilation to write portable code.
To understand what is happening "under the hood" of higher-level languages like Python or Java. Stephen G Kochan- Patrick H Wood Topics in C Programming
: It serves as a comprehensive guide to the library routines that form the bedrock of the language, updated for compatibility with System V and ANSI standards. One of the best explanations available on how
The true value of a Kochan & Wood book is found in the exercises. They are not multiple choice nor simple "fix the syntax" tasks. They are systems challenges . Stephen G Kochan- Patrick H Wood Topics in C Programming