In the late 1800s and early 1900s, it was very common for boys and young men to read about the lives of the so-called great men for the purpose of extracting lessons in how to be great themselves in whatever field they chose. I see these books as reviving that tradition by distilling ideas to their essence and putting them in a readily digestible form.

Alan Axelrod, Business Book Juggernaut – An interview with Mike Hofman, Jun 1, 2004.