Alexa is reading to me!!

Alexa echo dots (3rd generation) are on sale 1/2 price on Amazon. I ordered one for myself to be in our room upstairs.  It came today.  I just plugged it in.  I'm on the app and see that my kindle is hooked to her.  Cool.  Tapped a new book that I just loaded today.  And...Alexa started reading it to me!!!  Game changer!  I thought the music, relaxing sounds, alarms and message forwarding were the draw. How has no one told me she will read to me?!  What else am I missing here?!