If you’re looking to do some low-level Linux API/Kernel development, this is the book you want close by. This book has it all— from file IO, to processes, threading, memory management, socket programming, you name it. All with well explained examples in C.
This book is incredibly well structured and the authors delivers well explained concepts with code examples that makes this a vital reference book to any Linux system developer or software engineer.
Another great aspect of this book is that every system call comes with a complete, fully functional example program. This is unlike a lot of development books that just highlight particular methods or calls.
Definitely of the the best Linux reference books I’ve read. Highly recommend.
You can read more about it here.