Can't transfer iBooks pdfs from first gen iPad to new MacBook Pro
I have a bunch of important pdf files on a first gen iPad (iOS 5.1.1) that I want to transfer to iBooks in a 13" MacBook Retina.
In iTunes, choosing Devices >Transfer Purchases from My iPad isn't moving them over. I've been able to transfer all the non iBooks pdfs from GoodReader, etc. In iTunes, I can see them in the Books section of "On This iPad" but can't do anything but view info.
In iBooks, choosing File >Move Books from iTunes isn't doing it either.
Syncing warns me that it's going to delete the iPad files.
I'd rather not pay for 3rd party software if I can avoid it.
Thanks.
iPad, iOS 5.1.1