There could be a lot more imagination in how books are sold. -You could pay more for one with a celebrity reading it. -You could pay more to access podcast series that expands on the book and ensures it's up to date. -You could pay more for an abridged version. -You could pay to rent a digital copy for a short time. -You could pay more to access an online forum where people discuss the book -You could buy the first chapter of the book for $1 and see if you like it, before paying more to unlock each chapter. -You could pay to get a physical copy and the audiobook -You could pay more for an online training course based on the book, with live sessions, groupwork, and mentorship In fact the idea of books as complete items that don't link out to any media, that are not updated for years, on which you can readily see how others think, it's a remarkably outdated idea. If we consider the role of the book is not based around the physicality of the book, but the need to be inspired, to learn, to change how you think, books become very different commercial propositions. I may try an explore these false limitations in my next book. …see more