Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
When you’re ready to begin browsing the eBook selection offered by iBookstore, make sure your iPhone or iPad is connected to the Web, and then tap on the Store icon that’s displayed at the top of the Library (Bookshelf) screen. You’ll discover that the interface and layout of iBookstore are similar to those of the App Store; however, what’s offered here are exclusively eBooks.
You also have the option to shop for eBooks using iTunes on your primary computer. As soon as you make an eBook purchase, it will be added to your iCloud account, so you can then download it to your iOS device without having to perform an iTunes Sync. Remember, all purchases made from the App Store, iTunes Store, and iBookstore automatically get saved to your iCloud account and become accessible from any iOS device or computer that’s also connected to your iCloud account.