The Amazon Echo, is a Wi-Fi and Bluetooth speaker with a built-in personal assistant. It also allows for voice control of iTunes, Spotify and Pandora. More details can be found here.
With Kindle Books by Alexa, you can ask Alexa to read Kindle books in your library. Alexa reads books purchased from the Kindle Store, borrowed from the Kindle Owners' Lending Library or Kindle Unlimited, or shared with you using Family Library. Alexa reads your Kindle books with the same text-to-speech technology used for Wikipedia articles, news articles, and calendar events.
● Alexa, read "[Kindle book title]."
● Alexa, read my Kindle book.
● Alexa, pause.
● Alexa, resume my book.
● Alexa, go forward / back.
You can purchase the Amazon Echo for $179.99.