Kindle is Amazon’s own hugely popular eBook reader. Kindle owners
can download thousands of books on virtually any topic without ever
touching a computer.

kindle Publishing Pros:

Content formatted for the Kindle isn’t limited for use on a
Kindle. Many free readers are available that can read books meant for
the Kindle, including readers for iPhones, iPods, BlackBerries, iPads,
PCs, and the Motorola Droid.

Kindle Publishing Cons:

While the Kindle itself is not a low-cost item, many eBook
buyers expect the books they buy to be lower cost – after all, there’s
no printing involved. While you might sell an eBook online for $27 or
more, a Kindle-formatted version of the same book will probably sell
for no more than $10.