File formats you want are ePub, Mobi and PDF. That should cover pretty much all the popular devices. The iPad isn't really the best test for how ePubs will be rendered on Adobe RMSDK-based e-ink readers (although you definitely want to test your ePub on iBooks). I suggest getting a Nook or similar e-ink reader to see how the ePub would be rendered. Alternately, you could also test the ePub on the Adobe Digital Editions application on a computer.
|