[sdrothrock]

I use Google Books.

It syncs all elements of all of my activities across all platforms (Windows, OS X, Android, iOS) that I use. My main issue with it is that I can't download the stuff I uploaded, so it's not really good as a storage/backup solution, but that's fairly minor.

[skillachie]

Thanks for sharing. As you mentioned it works well for Google based books but you cant download the books your upload.

Would be interesting to hear your feedback if you decide to try BookFusion

[sdrothrock]

It works well for all of my books; I've only bought one or two books through the Play Store, and everything else I've uploaded.

Does BookFusion let me re-download books I've uploaded?