Well, I remember that he actually almost explicitly says this in a footnote in the part where he talks about choosing the right kind of product to sell, where s

Well, I remember that he actually almost explicitly says this in a footnote in the part where he talks about choosing the right kind of product to sell, where selling information is best because the markup can be thousands of percentage points. Nevertheless, although Tim Ferriss absolutely makes a ton of money from his book and speaking gigs, all of the things he describes in the book were accomplished, by definition, before he earned a cent of book royalties.