Do you have plans to develope this add on further? I am creating a book website/forum where book reviews will be posted, but I feel like this is lacking some necessary features. For example, what about authors who publish their books on barnes and noble, iTunes or Kobo? Will users be able to add a book they read, are reading or want to read to a "shelf" on their page? If you are willing to add these extras into this add on, I will be happy to contribute towards it. If you can add this, please message me and we can discuss further. I was going to have a similar book review add on developed, but if we can work together to add these features that I need, this would save me time and hundreds of dollars.