book app2 ebook2 offline book2 swift 52 admin panel1 author1 book author1 book chapter1 book cover1 book pdf1 book read1 books collection1 chapter1 ios app1 ios books1 library1 library app1 literature1 multi-language book1 online book1 online read1 push notification1 rate & reviews1 search1 storyboard1 xcode1