C: A Reference Manual, 5th Edition
The Standard C Library
C Programming Language, 2nd Edition
21st Century C: C Tips from the New School
Understanding and Using C Pointers: Core Techniques for Memory Management
C Interfaces and Implementations: Techniques for Creating Reusable Software
The Linux Programming Interface: A Linux and UNIX System Programming Handbook
Mastering Algorithms with C: Useful Techniques from Sorting to Encryption
Practical C Programming: Why Does 2+2 = 5986? (Nutshell Handbooks)
Linux Kernel Development (3rd Edition)