American marketing writer, founder of Yoyodyne and Squidoo, who has published a daily marketing blog for two decades.
Permission Marketing argued for earning attention through opt-in years before that became the default of email and content marketing, and Purple Cow made remarkability the product's job rather than the advertising budget's. The Dip supplies a decision rule for when to quit a market and when the difficulty itself is the barrier worth pushing through.
7 books of their own