Amazon Echo can read your Kindle books aloud on request
In-book navigation's pretty limited, but, hey, the service is free.
You don't even need to lift a finger when you're done playing Jeopardy! on Amazon Echo and want to relax with a book. Simply say "Alexa, read [Kindle book title]," and the voice assistant will start narrating almost anything you purchased from the Kindle Store, borrowed from the Kindle Owners' Lending Library/Kindle Unlimited or got access to through Family Library. Based on the commands Amazon listed, you can tell Alexa to pause, resume from where you stopped and skip chapters. But you can't specify which chapter to skip to, according to ZDNet.
That said, you obviously can't expect the narration's quality to be on par with a professional voice actor's reading for Audible. Want a taste of what it will sound like? Ask Alexa to read a Wikipedia or a news article for you: it uses the same text-to-speech technology for all these tasks. If you don't mind the voice assistant's robotic sounds, though, you're golden, especially since the feature's available at no charge.