You need an eReader software installed on your computer to read an eBook. The most commonly used eReader software for PC and MAC is Adobe Digital Editions. This reader is used when you have an eBook in the .ePub file format.
Download Adobe Digital Editions
Add and Open the eBook
Manually Associate the .epub and .acsm
The ePUb files bought from iTunes are DRM protected, no open source readers could let you read the books. Because you have to remove the DRM protection first, and then you could view the epub ibooks on pc. And the most powerful free Requiem could do this work, but it will cost a lot of time.And it the best one could do the work.One thing should remind is that this can only use it for personal, not commercial.
EPUB is an ebook format with the extension .epub. It is designed for reflowable content, meaning that an EPUB reader can optimize text for a particular display device. The same EPUB file will render flawlessly on a smartphone, tablet, e-reader, or computer.
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