This event marked the launch of Apple's new digital book service, Apple Books. The service allowed users to purchase and download books from the iTunes Store, as well as read them on their iPhone, iPod touch, and iPad. The launch of the Apple Books service provided users with a convenient way
From Wikipedia
Apple Books is an e-book reading and store application by Apple for its iOS, iPadOS and macOS operating systems and devices. It was announced as 'iBooks' in conjunction with the iPad on January 27, 2010, and released for the iPhone and iPod Touch in mid-2010, as part of the iOS 4 update.