[djur]

> The game industry and the iPhone app store have proven that when you price something closer to $1, it will generate exponentially more revenue than $40.

This may be true for mass-market, high-volume products like mobile games, (although even there the real money is in in-app purchases). It is not necessarily true for special-interest, low-volume products like this book. In order for it to be true, you need to assume that over 40 times as many people will buy the book at $1 as will buy it at $40. Frankly, the audience for this book is so narrow that I suspect that they would eventually get three times as many free downloads as they will get sales at $40.