Restrict access to explicit books and audiobooks in Books on Mac
You can prevent people who use your Mac from accessing the Book Store or Audiobook Store and from getting books with explicit content. If you set up Family Sharing, you can turn on Ask to Buy so that you’re asked to approve purchases for certain family members.
Control access to the Book Store, Audiobook Store, and explicit content
On your Mac, choose Apple menu
in the sidebar. (You may need to scroll down.)Click Content & Privacy, then turn on Content & Privacy.
Do any of the following:
Disable the Book Store and Audiobook Store: Click App & Feature Restrictions, then turn off Allow Book Store.
Restrict books with explicit content: Click Store Restrictions, then turn off Allow Explicit Books.
Turn on Ask to Buy
Ask to Buy is on by default for children under 13, and can be turned on for family members under 18. (Specific age limits might vary in different countries or regions.) See Turn on Ask to Buy for Family Sharing purchases.