ReK2 reviewed The C Programming Language by Brian W. Kernighan
Best C book ever to start
5.0 stars
If you are into Unix and systems programming or hacking this is a must

Brian W. Kernighan, Ritchie: C Program Language (Paperback, 1999, Prentice-Hall)
Very well known, classic introduction to the C Programming Language. Both a text for learning, a reference, and, to some, the definition of proper C language features and use.
Paperback
Published Oct. 1, 1999 by Prentice-Hall.
If you are into Unix and systems programming or hacking this is a must