One of the big selling features of the iPad is iBooks, the app and online store that turns the iPad into an ereader. But reading ebooks on the iPad doesn't mean you have to buy from Apple's iBooks Store. The iPad also supports other ebook file formats. These include:
- ePub - this open ebook format is used by many online stores. You can also convert other formats to ePub and then sync them to the iPad via iTunes.
- PDF - PDF is the reigning downloading document format on the website, so you're likely to find ebooks in this format. The iPad lets you load PDFs onto your iPad and read them via third-party apps.
- iBooks - the books purchased through the iBooks Store are actually in ePub format, but include DRM to prevent unauthorized sharing or copying.
- Kindle - Amazon's Kindle isn't just an e-reader that competes with the iPad, it's also an ebook format. Though you can't read Kindle books through the iBooks apps, you can read them on the iPad using Amazon's Kindle app.
- Barnes & Noble - Just like with Amazon, Barnes & Noble has an app that lets you buy read books purchased from their online store on the iPad.