The eBook format you choose must be compatible with your computer, handheld device, or eReader operating system, and the reader software you use.

Reader Apps Compatible with iPhone^®, iPad^®, and iPod^®touch

Adobe Digital Editions - Is a free app compatible with iPad^® that supports Adobe eBook DRM protected PDF and ePub formats. 

Bluefire Reader - Is a free app compatible with iPhone^®, iPad^®, and iPod^®touch that supports Adobe eBook DRM protected PDF and ePub formats. 

Reader Apps Compatible with Android

Aldiko - Is a free app compatible with the Android that supports Adobe eBook DRM protected PDF and ePub formats.