Scholastic Book Fair App. By scanning selected books, users have access to trailers, audio snippets and a selection of similar books.
A wireless connection is required. I also appreciated that users could scan both covers and UPC bar codes. This makes it easier for students to scan books on the shelf without a lot of shuffling to find boring labels.
The best feature though is the wishlist. Students can record all the books they want then email or print the list. This would function a lot like a gift registry, allowing parents to review and discuss options before they make a purchase.