I just went to http://www.amazon.com/ and pre-ordered John Piper's new book coming out on October 19th, 2007. I am looking forward to it.
It is called The Future of Justification: A Response to N.T. Wright. I encourage my readers to buy and read this book when it comes out. I too have been very concerned with the teachings of N.T. Wright and his redefinition of the doctrine of justification.
Piper's book will no doubt be a great help to the Body of Christ.