Unable to add books to my Books library

Hi David,

Wondering whether you use iPhone, iPad, Mac or ? to access your Books Library

NB: If needed You can change the MacOS version at the top of the linked page for accurate info:

For MacOS Sequoia: See how to: Import books, audiobooks, or PDFs in Books on Mac - Apple Support)

Eg Article says:

1. Go to the Books app on your Mac.
2. Choose File > Import.
3. Select the books, audiobooks or PDFs you want to import, then click Import.
4. You can also drag and drop books, PDFs and some audiobooks into your library.

(see below for how and where to drop)

Note: PDFs open in Preview (or your default PDF reader), rather than in Books.

_____________

For iPhone: see: Save and edit PDFs with the Apple Books app - Apple Support

(NB: Re: Mac: Above article also says:

Save a PDF to the Books app on your Mac

1. Open the Books app on your Mac.
2. Click PDFs under Library.
3. Drag and drop the PDF from your desktop or a Finder window into the PDFs section of the Books app.

Your PDF opens and automatically saves in the Books app. You can find it later in your Library.

Thank you for your reply, and for sharing what has worked for you, and what hasn't.

You may want to: Set up iCloud Drive on all your devices - Apple Support

or

For an overview of what you can do with Books on iCloud:

Keep your Apple Books library and settings up to date with iCloud - Apple Support

or

You may want to send feedback to Apple. They will likely not reply, yet your feedback will reach those working behind-the-scenes who can make software changes. If others are experiencing similar issues, they may be smoothed out in future updates.

Web-form for:

iPhone: iOS and iPadOS: Feedback - Books for iOS and iPadOS - Apple

and for MacOS: Feedback - Books - Apple