Most of my PDFs are lost
I had shitloads of important PDFs saved on my iPad. Usually those were synched to iTunes, there I found them in section "books". With Mavericks and iOS 7 and the new iBooks on Mavericks, MOST OF MY PDFs are gone! Nowhere to be found, not on the iPad, not on my MAC. I am so frustrated because I lost so many IMPORTANT documents which cannot be regenerated.
Does anybody know what might have happened, where my documents might be?
Thanks for any hint on this.
iPad, iOS 7.0.4, iPad Air, Macbook Pro with Maverick