Different books work for different folks, and lots of people seem to love this one. I however love C and found this book to be an abomination. K&R is brilliant. Given an opportunity, I would eradicate this book from the face of the earth lamenting only the damage it has already done.
You usually have to get pretty implementation/purpose specific beyond that. More often than not, the next step is APUE, which is dissatisfactory for what I have in mind.