Then you might be interested in the Author! Author! blog by John.
Why not read A Vested Interest on the new 7" Kindle Fire HDX?
We've got one - it's brilliant - if you want a larger screen get the 8.9" HDX (which has a higher resolution than the iPad 'retina' screen)
You don't need an e-reader if you have a smartphone though. Just download the FREE Kindle App.