What is the best iOS app for accessing my existing ebook library across multiple devices and continuing reading where I left off, even after upgrading to a new iPad?

Barnes & Noble NOOK is a great choice for accessing your existing B&N ebook library across multiple devices. It allows you to sync your reading progress, bookmarks, and notes across all your devices, including iPhones and iPads. This means you can start reading a book on your old iPad and pick up exactly where you left off on your new iPad. To ensure your library transfers, make sure you are logged into the same B&N account on both devices. Sometimes, a simple app restart or device reboot can also resolve syncing issues. If you still face problems, check your network connection and ensure the app is updated to the latest version. With NOOK, managing and enjoying your digital library on different Apple devices becomes effortless, providing a consistent and convenient reading experience. The app also supports sideloading PDR & ePub files.