Realpolitik: A History, by John Bew, is due to be published in the U.S. by Oxford U.P. on Dec.1, according to Amazon; presumably the book has already been released in the UK. It clocks in at roughly 400 pp. (some of the contents are available at Amazon Look Inside); the author's previous book, a biography of Castlereagh, was longer. Whether Bew has much that is new to say about postwar American realism is perhaps doubtful, given the amount of extant scholarship on that particular subject, but the book claims to be the first comprehensive history to trace Realpolitik from its German roots to its American (or Anglo-American) variations.
Speaking of books, I currently have a review in the works of this, but the review probably won't be up for a while, for various reasons. So expect things to be quiet here for the immediate future.