Hide purchased books
You can hide books in your iBooks library that you don’t want to see on any device. If you have Family Sharing set up, your family members can’t see or download hidden books.
Hide a book
Click iBooks Store in the toolbar (or choose Store > Store Home), then click Featured in the toolbar.
Click Purchased below Quick Links on the right, then click All.
Place the pointer over a book you want to hide, then click Delete .
Unhide a book
Click iBooks Store in the toolbar (or choose Store > Store Home).
Click Account, then enter your password.
In the “iTunes in the Cloud” section, click Manage to the right of Hidden Purchases.
Click Unhide for each book you want to now show in your library.