There is a critical review of The Birth of Territory by Phillip Campanile in Antipode (pdf). Campanile clearly found the book frustrating in its mode of execution, but also not linked explicitly enough to contemporary debates. As he rightly notes, though, the book sits alongside my earlier Terror and Territory, which I always saw as the best answer I can provide to why this all matters today. Nonetheless, a disappointing review.
Update: Peter Gratton has a nice discussion of the review here.
Update 2: Phillip Campanile replies in comments.