would be hailed decades later by Fortune magazine as “probably the best sales manual ever written.” That young salesman was David Ogilvy. Before David Ogilvy was David Ogilvy he sold Aga stoves door-to-door. The Theory and Practice of Selling the AGA Cooker Sales Training Manual.David Ogilvy, a rising star in the sales and marketing team produced a sales manual to go with the launch. Fifty years later Fortune magazine still considered.