Hi jimsliwa,
Welcome to the Support Communities! You should be able to download your purchased iBook directly to your iPad. Here's how:
Download past purchases - Apple Support
http://support.apple.com/en-us/HT2519
With iTunes in the Cloud, you can access your past purchases from the iTunes Store, App Store, iBooks Store, and Mac App Store.
Follow these steps to download purchased books:
- Tap iBooks. If you're using iBooks 3.2 or earlier, tap Store.
- Tap Purchased from the bottom navigation bar.
- Tap the book that you want to download.
If you continue to have issues with this particular purchase, click on this link:
Report a problem with an item purchased from the iTunes Store, App Store, Mac App Store, or iBooks Store - Apple Support
http://support.apple.com/en-us/HT204084
I hope this information helps ....
- Judy