Cool Reader is one of the best program for book reading.
There are many programs for Android to read books. They are almost the same, and mostly they cannot open .doc and .rtf.
Cool Reader does not have e-shop, and don’t make abracadabra. It’s only open many formats of books. Easy and cool.
However you have many settings to make your book reading more comfortable.
With Cool Reader you can open the following formats: epub (non-DRM), fb2, doc, txt, rtf, html, chm, tcr, pdb, prc, mobi (non-DRM), pml.