I highly recommend this and a bunch of other C-related stuff in the Stanford CS library. Their pointer explanations helped me many, many years ago. http://cslibrary.stanford.edu/
Along with Kernighan and Ritchie, I would also highly recommend getting a copy of 'C: A reference manual' by Harbison and Steele. That book explains a lot of stuff by topic and with descriptive examples. Especially beneficial for a quick reference.
Highly recommended.