Apple has updated the backend of the iBookstore, adding new features for authors like enhanced versioning, larger pixel limits for in-book images and more, according to a letter to authors from Apple obtained by AppleInsider. Apple notes the addition of the following features and updates: - New Catalog Reports - Versioning for All Books - Updated Documentation - Pixel Limit Increased for Book Images - How-To: Deliver Custom Samples - New European Toll-Free Numbers - iBooks Author Tips and Tricks: Creating Custom Samples - Thanksgiving DeliveriesVersioning requires authors to submit a "What's New in Version" description when updating th
