This isn't at all the answer to what you asked, but I hope you can forgive my asking that, if you use the F-droid store on Android, may I recommend an app called Cool Reader, and a cheap Google Play Store app text to speech engine by Cereproc?
The voice might be a bit "Steven Hawking", but having one's phone read books to oneself opens a vein of the richest thoughts of humankind throughout time.
Whether you want to "read" a medical handbook of ADHD, or Adam Smith's Theories of Moral Sentiments and The Wealth Of Nations, or The Rise And Fall Of The Great Powers, or Flatland, or Seneca's Letters To Lucilius, or Wind Sand And Stars: if you can find them in epub, you can smash them into your brain as easily as Keanu Reeves in a dystopian future.
(Hint1: you can find them in epub. The best books are long out of copyright, and can be found on "pirate libraries" like z-lib, Anna's Archive, or libgen. Hint2: if reading from a mobile 'phone screen consider fettling the settings. Amber text on a black background, with font and margins tailored to your taste is invariably far finer than the default settings. Hint 3: I previously tried Cool Reader from the play store and it had been compiled by a third party with advertising nonsense and God knows what else. Get the F-droid store and install it from there for your own security. It's open-source and doesn't try to send your data anywhere. Hint4: for complex subjects while driving etc you might consoder altering the reading speed.)