The November/December 2016 issue of CrossTalk is up and the subject of the issue is “Beyond the Agile Manifesto”. CrossTalk is “The Journal of Defense Software Engineering” and as a U.S. Government publication is freely available.
Of the six major articles in the issue, five of them are focused on Agile in one way or another. And one specific article I recommend everyone read is “The Heart of Agile” by Alistair Cockburn.
CrossTalk often has very good articles in it, and this issue in particular seems worth reading.