Another concern (which I have not confirmed) is that with the Kindle Fire, Amazon has made it difficult (not impossible, but tedious) to read non-Amazon ebooks:
Kindle Fire Revew I installed Bluefire Reader on my wife's Kindle Fire and it works very well for non-Amazon ebooks. It supports ePub and PDF.
Yes, Adam Engst, in his April 2012 TidBits[1] article:
How to Download EPUB, PDF, and Mobipocket to the Kindle Fire lists Bluefire Reader as one of his top three choices for ePub reading on the Kindle Fire:
Adam's article indicates you have to temporarily disable protection to install Aldiko on the Kindle Fire, and this FAQ at the Aldiko site indicates the same:
How to install the Aldiko Book Reader on Kindle Fire? This article also recommends Aldiko for ePub reading on the Kindle Fire, but doesn't say what ePub alternatives were considered:
The Best eBook Format for the Kindle Fire is Epub [1] I'm surprised TidBits is still going - I used to read it 23 years ago!