If you want to learn C, K&R is the right way to do it.
C: A Reference Manual is excellent and is probably the only other C book you need, but only if you are already a C programmer, and only for what the title implies: reference.
In addition to K&R I always recommend "C Interfaces and Implementations: Techniques for Creating Reusable Software" to anyone who is picking up a long-term hobby or career in C.
Someone on this forum recommended it to me. It's been invaluable assisting me in refactoring major portions of a legacy code base. In a way, it's helped me bring the DRY principle to our C application. I write in C every single day though and it may not be applicable for a hobbyist/generalist.
I loved my Harbinson/Steele C book, a long time ago. Google says the last version came 2002 with additions on the web. Good memories, I'll buy a copy and read just for nostalgia. Thanks.
C: A Reference Manual is excellent and is probably the only other C book you need, but only if you are already a C programmer, and only for what the title implies: reference.