No ringing endorsements, just a small list of apps I use and like.
Aldiko Book Reader Premium – Android Apps on Google Play (Or the free version Aldiko Book Reader – Android Apps on Google Play Same features, I just bought it to support the app)
and also, though not for everyone
And in no significant order.
blog.cone 
funny thing, Right after posting, I decided to try Moon+ reader instead of Aldiko and it might actually be better!!
https://play.google.com/store/apps/details?id=com.flyersoft.moonreader&hl=en
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