Quick read. Entertaining. His clever turns of phrase can be tiresome tho', like he's trying too hard.
Is marketing an art? To me, art is doing something and not really caring whether people like it or not. If people do like it, then that's a bonus.
But marketing an art? If people don't like it, then you'll lose millions. So, no. Marketing is definitely not an art. It's premeditated, careful research and analysis is involved.
I would think these people featured in the book are gamblers, really. Trying their luck and as it happens, luck was with them, sometimes.