What are the Best NLP Books

What are the best NLP books? What is the single best NLP book? How do you get a good library together and save as much money as possible on the right resources?
These are all very fair questions and ones I get asked all the time. Sometimes people ask these questions before they invest, and sometimes not. It isn’t until the 5th book they purchase that people realize they keep buying different descriptions of the same techniques and patterns. In essence, they are getting different versions o