Please be aware the the Mac OS X Mavericks release comes with the long-awaited iBooks reader for the Mac, allowing the reading of iBooks on the Mac without requiring an iPad. While this is a good thing, moving your purchased ebooks into iBooks on the Mac changes the way ebooks are managed if you have an iPad as well. Ebooks are no longer managed in iTunes as previously, but now in iBooks. First load your ebook into iBooks on the Mac. To load the book into your iPad, connect the iPad and select the device. From the ‘Books’ menu item that is shown at the top of the iTunes page, select the checkbox next to the book and then synchronise to the iPad using the Sync and Apply buttons in the bottom right hand corner. You should now be able to read your ebook on the iPad.