Though another ebook format - EPUB are used widely with many mobile devices, PDF is still the most popular ebook format. When Apple announced the iPad, many people immediately imagined that it would be a superior way to read PDF books in a tablet-style format. Just with iTunes 10.1 or later, you can easily sync PDF files to iPad including iPad 2, the new iPad and iPad 4; and with iBooks 1.2, you have the ability to view PDF files on iPad, no matter opening them as a PDF email attachment, or read PDFs on iPad after syncing them via iTunes.
View PDF files on iPad - Email method
iPad supports to view PDF files that are sent as attachments via email in the Mail application. Just send the PDF as an attachment to yourself, then go to the Mail app (not the browser) on the iPad and open the email; simple tap the upper-right corner of the screen and find "Open in iBooks" to view PDF files with iBooks.
When you use iBooks to open a PDF, iBooks will automatically save a copy of the PDF to your iBooks PDF shelf. These PDFs will also sync back to your iTunes Book library the next time you sync your device with iTunes.
View PDF files on iPad - Sync PDFs with iTunes
To sync PDF files to iPad with iTunes, you have to make sure that your iTunes version is updated to 10.1 above or latest, then follow below steps to sync them onto your iPad/ iPad 2/ New iPad/ iPad 4.
1. open iTunes and click on the Books tab.
2. Enable the Sync Books checkbox. And you can choose to sync all PDF files or just select some PDF files to transfer to iPad.
3. Sync PDF files to iPad and open them in iBooks for viewing.
When you use iTunes 10.1 or later to sync your PDF files to iBooks 1.2 or later on your iOS device, a backup of your PDF will be automatically created. A copy of the PDF will be added to your iTunes Books library.
If you have few PDF files for viewing on iPad, you can use the first Email method; but if you deal with a lot of PDF files, the latter way to transfer PDF files to iPad is more convenient and efficient.