(Subscription needed), but as Open Geography notes below, responses to Stuart Elden’s The Birth of Territory are available.
“Reading Stuart Elden’s The Birth of Territory” is now available at the Political Geography journal website. This is an “Author Meets the Critics” discussion forum, based on Stuart’s book, that was held at the Tampa 2014 AAG meetings, and includes contributions from Anssi Paasi, Juliet Fall, Alexander Murphy and Joe Bryan. Stuart also provides a response. The forum was organized by Claudio Minca and myself.
Innovatively, Juliet’s response is in the form of a stop-motion video (available here) in addition to her written contribution!