There are so many changes happening in the reading world that it is hard to keep track of them all. I regularly search the Android market for eBook readers just to see what is out there. Many work just fine while other I cannot get to work at all. Let me list a few that I have found.

#1

Kindle for Android

The Kindle for Android is optimized specifically for Android devices. There are many look copies of the same reader that I urge caution because if you are looking for simplicity of use you will need this one.

Price is FREE with less than 250,000 downloads thus far and has a 5 star rating.

#2

Adobe Reader

I have the Adobe Reader and it is a little disappointing. It reads that it reflows the content for adjustment to smaller screens but it does not do this very well. There is still a lot of scrolling if the document was not published correctly. I would like to see Adobe Reader flow all published pdf documents correctly. The most common complaint seems to be the failure of Adobe Reader to have bookmarks.

Price is FREE with less than 250,000 downloads thus far and has a 4.5 star rating.

#3

Google Books

This reader boast of cloud serving where your library is kept along with 3 million free books available for your reading pleasure. There are bookmarks even though some do not see them or know how to use them.

Price is FREE with less than 250,000 downloads thus far and has a 4 star rating.

#4

Aldiko Book Reader

This is an independent eBook reader. You can download any epub or pdf file formatted eBook into the Aldiko as well as shop through their library of thousands of available books. Some Android phones have problems with opening books in the Aldiko but seems to be mainly because of the file format itself.

Price is FREE with less than 250,000 downloads thus far and has a 4 star rating.
Price for Aldiko Book Reader Premium is $2.99 with 10,000 - 50,000 downloads thus far and has a 5 star rating.

#6

Cool Reader

This is an independent eBook reader. This reader can read epub, doc, fb2, txt, rtf, html, chm, pdb, prc, mobi (non-DRM) and pml formats. Page scrolling or turning, bookmarks, table of contents, search are some of the highlights inside this reader.

Price is FREE with less than 250,000 downloads thus far and has a 5 star rating.

#7

Moon+ Reader

This book reader is powerful coming with many controls and functions. Supports epub, html, umd, fb2, chm, zip or odps. Some of their main features include full visual adapter (including line spacing), day & night options, various page turning options and many others. Very good reviews.

Price is FREE with less than 250,000 downloads thus far and has a 5 star rating.
Price for Moon+ Reader Pro is $4.95 with 10,000 - 50,000 downloads thus far and has a 5 star rating.

There are many others but the above gives you the top searches. I actually have begun reading on my smartphone because I always have it and have found it very enjoyable.

Keep Reading. . .and using your Smartphone.