Have you seen Lookybook?

Found on SLJ's ExtraHelping - Preview a picture book before you buy it at Lookybook. Lookybook.com bills itself as "the world's longest bookshelf" and a "test track" for picture books—all for free. Before buying or committing to a picture book, parents, teachers, and librarians can view the work in its entirety using the site's whimsical "page-turning" tool. It's a lot of fun too!