"I recently purchased a Kindle book and noticed that Audible offered a free audio version. But eventually I discovered it was not free and they had me signed up for a subscription. You know, those sneaky little leaks that gradually drain your bank account when you are not watching. Buyer Beware!"
I hijacked this article from here: Free Audio Playback of any Kindle or iBook
Open Settings and General->Accessibility->Speech->Speak Screen then Enable Speak Screen. Below on the same screen, you are able to select from voices. Then use a two finger swipe down from the top within your Kindle or iBook App.