They're the most recent, and both are excellent. I used to have two copies of Manning and Schütze — one for home and one for work.
Winograd's Language As a Cognitive Process was the first NLP book I owned and I still refer to it once in a while.
Perera and Schieber's Prolog and Natural-Language Analysis is good if you're interested in logic programming and NLP. It's dense though.
Search on Amazon for "natural language processing" and you will find a bunch of books from Springer that were released in the last year or two.