iBooks for Mac: Update and download purchased books
iBooks lets you know when your books have updates available. At any time, you can also download any of your books from iCloud. For example, if you bought a book on another device or previously deleted a book from your Mac, the book is in iCloud, and you can download it whenever you want.
Update books
When updates are available, you see the Downloads button
in the top-right corner of your library or the iBooks Store.
Click the Downloads button
, then choose the books to update or click Update All.
, then choose the books to update or click Update All.
For information about what happens to your highlights and notes when you update a book, see the Apple Support Article
How highlights and bookmarks are migrated when you update a book.
Last Modified: Nov 4, 2013
.