When it was published, The Possibility of Progress garnered one or two positive comments.: Tony Benn thought it "a deeply moral and intellectual book". James Robertson called it "important, impressive and readable". Tony Vickers suggested that it might be "the book that Henry George would have written if he'd been alive today."
At the book launch Tony Benn, Clare Short and Susan Kramer all turned up to give their backing to the book, more information about which you can find here.
I'm currently working on another book which explores similar themes from different angles, but while that one is in production, The Possibility of Progress should keep you going.
If you're in the United States, you can order it through amazon.com by clicking here. (Sorry, no discount).
Of course, if you can afford it, and have an independent bookshop nearby, why not get them to order it in for you? It'll cost you the full price (£14.95) but you'll be supporting a small business, rather than a corporate giant, and contributing to the cause of progress in a tiny way.