Not sure how well that would work in practice but it resonates well with me. What hooked me was the title and the word free, the advantage with free is that I don't have to make up my mind on how much it is worth. My first reaction was that I could, since it was free, just grab it and see what it was.
But the instant I came to the site I felt guilty. I ended up paying the suggested price only because the suggested price was sensible (if the suggested price had been more I'd probably would have paid less) and because leanpub seems awesome (just found out about it). Since I know nothing about the book itself I didn't take that into account when buying, it could of course be worth much more.
EDIT: DRM-free and giving me multiple formats to choose from (and not forcing me to select one) is awesome and is one of the reasons I really wanted to buy it. Otherwise I would have had to strip the DRM first (I don't accept DRM on e-books that I buy, even if it makes me a criminal).
But the instant I came to the site I felt guilty. I ended up paying the suggested price only because the suggested price was sensible (if the suggested price had been more I'd probably would have paid less) and because leanpub seems awesome (just found out about it). Since I know nothing about the book itself I didn't take that into account when buying, it could of course be worth much more.
EDIT: DRM-free and giving me multiple formats to choose from (and not forcing me to select one) is awesome and is one of the reasons I really wanted to buy it. Otherwise I would have had to strip the DRM first (I don't accept DRM on e-books that I buy, even if it makes me a criminal).