Computer Networking: A Top-Down Approach (6th Edition)

The Unix Programming Environment by Kernighan, Brian; Pike, Rob

Understanding UNIX/LINUX Programming: A Guide to Theory and Practice - GOOD

Advanced UNIX Programming

The UNIX Programming Environment Paperback Rob, Kernighan, Brian

UNIX Network Programming: The Sockets Networking API, Volume 1, 3rd Ed. Stevens

Computer Networks (5th Edition)

The Design and Implementation of the FreeBSD Operating System (2nd E - GOOD