The iPad is another of Apple's revolutionary products, which effectively changed the entire landscape of tablet-style computers when it was released to the public.
iBooks
The built-in way to get eBooks for your iPad is through iBooks and iTunes. iBooks is an app that you can use for the iPad or the iPhone. You can buy eBooks in iTunes or the iBookstore and download to your iPad from there.
Bluefire Reader for iPad
Bluefire Reader is an excellent app to use if you don't want to
get eBooks through iBooks or Apple's channels. Bluefire Reader will let you read
DRM'd Adobe eBooks, both PDF and ePub formats. That is very useful because most
book publishers are now making their eBooks available in those formats.
Bluefire Reader will work on iPad or iPhone. Get eBooks for iPad and Bluefire Reader here. Step-by-step instructions for how to transfer files to your iPad are here.
And if your iPad has a problem, you can contact iPad Reparatie Utrecht and have your iPad 3 or iPad 4 fixed.
Stanza
If you have ebooks in .pdb format that you want to read on your iPad, you can use Lexcycle's Stanza app. They have instructions for setting up Stanza Desktop and using it in a specific way that will allow you to transfer .pdb ebooks to your iOS device. There is community support for Stanza at getsatisfaction.com/stanza