First off, nicely designed site, and nice description of how it works.<p>This is something I was thinking about early in the year, and as a result, I started taking notes while reading. Though, that assumes I'm a good note-taker, which I may not be.<p>I'm not a fan of your pricing model, I'm sure you've thought of freemium, or affiliate models, and personally, I think that you'll get more traction with that.<p>It also appears that only you create the quizzes. That's interesting. Why not get the community to build the quizzes? That gets you more books, and if the community can update each others quizzes, etc. likely you will end up with a better overall quiz along with more of them.<p>My father always said that teaching somebody else is the best way to ensure you know the material. He used to be a teacher, so I guess there is some truth in that.<p>If I were you, I'd make the site free to use. Free to take a quiz.<p>After I have taken a quiz, you know what book I've read, so you can make recommendations on books that I should read. How many books do I have to buy via affiliate links to get you the same revenue as your $10/year?<p>I'm not ready to convert yet, but I'd like to give a quiz a try at least. But I'd need to know that you have quizzes for the books I've read. I think that is your biggest hurdle at the moment. Crowd source it.<p>Keep up the good work.