While it pre-dates ANSI C and contains a few quirks you wouldn't necessarily want in production code, I found the book to be a lucid and fantastic resource to help explain how data structures work in C, as it gives hands on applications through the building of a working piece of admin software (albeit a slightly outdated one!).
If you're aware of how pre-ANSI C differs from C89/99 et.al with regards to function and parameter declaration, it's worth buying a used copy on Amazon just to leaf through - there are copies going for a single cent (plus shipping) at the moment.
His first book 'Learning to Program in C' is also great reference to read alongside K & R (which should be mandatory reading for anyone looking to learn C, not necessarily for the code style or examples but to get a handle on the ethos of the language).