This is the much anticipated 2nd edition of Napoli's masterpiece, which was published in 2003 with the same title. Since I enjoyed the 1st edition so much that I bought and read the 2nd edition immediately after its publication last year. But I was very, very disappointed by this 2nd edition.
My disappointment was mostly due to the additional author of the book, whose English is not good (sometimes even ungrammatical) and whose logic is often nonexistent. Although the back cover of the book says, "This thoroughly revised edition...," the reality is that each chapter was curtailed in some parts from the 1st edition and new material was added instead by the 2nd author. Also, there are three new chapters, but all of them seem to have been written exclusively by the 2nd author. This is easy to tell, since Napoli's English is much, much better than that.
I hope OUP will continue publishing the 1st edition, which I would recommend most highly to anyone who was interested in human language. Unfortunately, however, the 2nd edition is not worth the money or time. I wonder if Napoli proofread the whole manuscript before its publication.