I have both of these books, and have set about to do a detailed comparison between these "editions" which I hope to list here sometime... But from a wide view I can see the influence of James Edmiston in the new one in terms of promoting elements of his legacy at Sterling which may have been missing from the first one. After all TGOD authors did not include him, and as far as I know Howroyd (RIP) & Laidler did not contribute anything to this new book.