History A Higher Form of Killing: Six Weeks in World War One That Forever Changed the Nature of Warfare by Diana Preston, review: ‘authoritative’ – Telegraph Posted on February 18, 2015 by johnbarleycorn12 A Higher Form of Killing: Six Weeks in World War One That Forever Changed the Nature of Warfare by Diana Preston, review: ‘authoritative’ – Telegraph. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading...