[apple-iphone] All my books have disappeared

Hi,

All of my books and PDFs have disappeared from my iPad (3). I thought they were being backed up by the iCloud. I don't think I changed anything recently.

Suggestions would be appreciated.

Robert Poland
2.7 GHz Intel Core I5, 27" iMac
12 GB Ram, 1TB HD, OS 10.7.4
iPad (3), 32 GB, iOS 5.1.1


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