I don't know if it's exactly the same book as Boxford's 'Know Your Lathe', but there is a book of the same title by Denford's Engineering Company listed at TEE Publishing for £4.95. I suspect it's an earlier edition of the same book as Boxford's and Denford's were almost the same company, I believe, or at least co-operated closely with each other. Of course, I stand to be corrected, but in any event a fiver is hardly any great loss if the book is purchased in error.