Is your feature request related to a problem? Please describe.
It'd be great if you can listen to your books with a text-to-speech feature, which can transform any eBook into an audiobook.

Describe the solution you'd like
A button somewhere for text-to-speech. Highlight the active word currently being spoken, and automatically scroll the page to keep in sync with the current spoken word. Perhaps also skip redundant text, like the table of contents.

Describe alternatives you've considered
Not all books have audiobooks. It'd also be handy to do this, so you don't have to get a copy of an audiobook for whatever book you're reading.