Books shown as "Not on this iPad" are on the iPad
When I look at my Purchased books, some appear in a "Not on this iPad" tab. In this tab, the books have the 'cloud and arrow' download symbol next to them. When I tap the 'cloud and arrow', it switches to Downloading, but the download never completes.
When I look at the books in My Books, they are fine. They have no download symbol, and I can read them.
The list of books stuck in this limbo seems to be growing.
How can I fix this?
iPad Air Wi-Fi, iOS 7.1.2