ipad books bought items gone

Are you certain you purchased them?

See your purchase history for the App Store, iTunes Store, and more - Apple Support

If so:

Redownload books and audiobooks - Apple Support

M.J.M. Ornstein Said:

"ipad books bought items gone: I bought two books and the purchase disappeared. Now they want me to buy it again but i already did!"

-------

Hidden Books:

Perhaps these have become hidden purchases? To see if that is the case, unhide them. Go here: Hide Purchases from the App Store - Apple Support