A good introduction as to why the marketing/advertising world is significantly different not only from the "Mad Men" days, but also from as recently as 10 years ago. The consumer has much more information from a multitude of sources (albeit some of limited credibility) - we still don't know if that state necessarily results in better decisions! I am certain that the paperback edition will have some substantial revisions - due to the rate of change in the industry, and the impact of the #MeToo movement (which claimed Martin Sorrell in early 2018 and probably hangs in the air over other players in this space, yet to be revealed.)
I am most award of changes - Advertising Age, cited as the bible of the industry, has shrunk from a wholly paid circulation weekly of over 100 pages to a controlled-circulation (read "free") of half its former size, issued biweekly.