iBooks, also known as Apple Books, is Apple’s official e-book reader app that allows users to browse, download, and read e-books and PDFs on iOS and macOS devices. It supports various formats, including m4a, and is a popular choice for both casual and avid readers. However, many users ask questions like “How do I share books on iBooks?” or “How to share a book in iBooks for free,” as well as seeking ways to integrate with the iBooks API for automation.