They may not have been published this month, but they were kindly sent to me this month by publishers and/or authors:

Habermas:  Introduction and Analysis by David Ingram (Cornell University Press, 2010)

The Concept of Law from a Transnational Perspective by Detlef von Daniels (Ashgate, 2010)

Torture, Terror and Trade-Offs:  Philosophy for the White House by Jeremy Waldron (Oxford University Press, 2010)

Metaphysics:  5 Questions edited by Asbjorn Steglich-Petersen (Automatic Press, 2010)

Philosophy Bites:  25 Philosophers on 25 Intriguing Subjects edited by David Edmonds & Nigel Warburton (Oxford University Press, 2010)

The Imperative of Integration by Elizabeth Anderson (Princeton University Press, 2010).  The Anderson book, which I've been reading, is a real tour de force of philosophical argumentation utilizing social science data.