Why can't I add books to iTunes wish list?h

You should be able to add them to your wish list on your computer's iTunes (and iBooks app on Mac computers), but not on your iPad : http://www.apple.com/feedback/ibooks_ios.html

I've got exactly the same problem - I can add a book to my wish list, but it doesn't appear there. Moreover - books that I added previously just disappeared.

Would be very grateful for your help!

Have a good day all!

There have been a number of posts over the last few week or so about wish lists being blank - does anything (app, music etc) still show on yours, on either your computer's iTunes or iOS device ? Presumably there is/has been a problem on Apple's end

My books wish list has been empty for around 2-3 months. Interesting thing, music and apps wish lists work just fine, and it doesn't depend on the device I use.