Virtual bookshelf space is unlimited, but consumers attention spans are not. (davidmarkbrownwrites.com)
Virtual bookshelf sites allow readers to list the books they've read, give the books reviews, and talk about them with other book lovers. (blog.infinitypublishing.com)
Make room on virtual bookshelves for your next ebook — those (often free) PDFs a few dozen pages long that people from all over the world are reading from their iPads and Kindles. (mashable.com)