A couple of months ago I bought an e-book from Apple within iBooks on my iPad 2. At first the book appeared normally in iBooks, but when I just went to look for it, it wasn't there. The iPad has been backed up in iTunes to a Windows PC. When I look in iTunes on the PC, I do see the e-book. Now my only problem is how to get it back onto the iPad. The only option I'm seeing is to sync the books on the iPad to iTunes on the PC (which, I'm warned, will delete all the books on the iPad). Not sounding preferable. Within iBooks, I clicked on "Purchased" and see a page for the e-book, but it says "Downloaded" and the button is grayed-out. Any suggestions on how to get the e-book onto the iPad again without having to wipe everything on the iPad?