I got the new iPad. I do not manage to get back any of my my books and pdf files onto the iBook app. I synched my new iPad with the backup of the old one, all the apps are OK. But there is noting in iBooks. I tried for switch on and off both iPad and my MacBook Pro, no results. Please help.
iPad 2, iOS 5.1, in fact I am considering bnew iPad
If they aren't on your computer then you should be able to copy the ibooks and PDFs from your old iPad to your computer's iTunes via File > Transfer Purchases, and you can then sync them to the new iPad - also as long as they are still available on the store then ibooks can be re-downloaded for free in the iBooks app and/or on your computer.