Given I have a multi-OS environment (OS X Mountain Lion, Android ICS for S3, and iPad), I was looking for an e-reader that supports all three. For now I've settled on Nook and have it working with no issues on the S3. I struggled a bit on the MacBook Pro and after a few reinstalls and workarounds that did not work for the Nook for Mac, tried the Nook Study for Mac. So far I can access my content. The Nook for iOS and iPad worked without issues. As a quick experiment I opened a book on the MacBook and it opened up to the last page I was reading on my S3. So far so good with this setup. Hope this helps others who may have a similar multi-OS environment.