Choose Books > Settings, then click General.
Do any of the following:
Select Home to see what books and audiobooks you’re reading across your Apple devices.
Select “Collections, bookmarks, and highlights” to see your collections, bookmarks, highlights, and recent book info across your Apple devices.
You can use a cable to update and transfer items between your Mac and an iPhone, iPad, or iPod touch. See Access books on other Apple devices in the Books app on iPhoneHide and unhide purchased books and audiobooks in Books on Mac