I'm a potential for your site, but your site does not seem like it gives me immediate value. I have simple needs:

1. I want an easy way to add books I liked 2. I want recommendations on new books based on those 3. I want to be able to recommend books to my sister (and only my sister), and I want her to be able to recommend books to me

It's not clear if your site does this, and it looks too complicated anyways, so I decided not to sign-up. I'm looking for absolute simplicity that does just what I want, and all other features are hidden away.