Thanks for your feedback. On Bookhuddle, you can easily add books that you like to your list, simply search for the book and click "add to list" and select the list you wish to add it to. You can also tag the book and tagging with one of the predefined tags automatically adds the book to the related book list.

You can also recommend books to anyone within or outside Bookhuddle, simply click on the "Recommend to friends" link on the book detail page or any search result page.

The Activity Feed is also a great way to discover books through your friends. When they interact with a book (write a review, participate in discussion, add to a list, etc), you find out.