Buy this book
If you enjoy C, get this:
Title: "Expert C Programming"
Author: "Peter van der Linden"
I coded C for years and then read this book and at that stage I found it easy to read, interesting, both entry level AND expert level too. The guy ran the Sun "C" Compiler team and then later was a key player in the Java project.
It explains all the quirks of the language, common pitfalls and it is not a doorstop. I can't recommend it enough, it' actually enjoyable and explains all the WTFs you get in a succinct way.
P.S. It's orange with a blue fish on the front.