There are no books in Apple 1 1 settings, because books are not native applications or functions of the operating system. According to the public information about the query, although Apple launched the iBooks application, it was downloaded and installed through the AppStore, not built into the operating system. Therefore, it is normal that there is no book option in Apple 1 1 settings. If you want to read books on iPhone 1 1, you can download third-party reading applications or import e-books through iTunes.