Churchill's name gives a history book a familiar subject with strong sales appeal. Churchill's Secret War provides the immediate example of using that name in a title. Adding it to another book is joked about as a way to multiply sales. That commercial advantage does not justify attaching Churchill to a subject with no legitimate connection to him.
Notable Point · 1:19:05-1:33:09
Churchill as a popular-history sales signal
Churchill's name can broaden a history book's sales appeal, provided the subject actually justifies using it.