Personal google play books, how to make them voice-readable? I am trying to load a couple of personal ebooks on my google play account, so that they are readable by google play books. The books are DRM-free, also.

Is there any way, to make them voice-readable? If not, what are the prerequisites? To all my tries till now, the "read aloud" option is disabled.
You can use the Google's Text-to-Speech app from the playstore. It allows you to read text on the screen aloud by using the device's text-to-speech feature.

Features: 
As mentioned in the description, it can be used by: 

• Google Play Books to “Read Aloud” your favourite book.

• Google Translate to speak translations aloud so you can hear the pronunciation of a word.

• TalkBack and accessibility applications for spoken feedback across your device.

• And many other applications in Play Store

How to use?

To use Google Text-to-speech on your Android device, go to Settings &gt; Language &amp; Input &gt; Text-to-speech output. Select Google Text-to-speech Engine as your preferred engine.



Text-to-Speech Screenshot - Click to enlarge image

To start listening to books:


Open the Google Play Books app Google Play Books app.
Open a book.
Touch the center of your screen.
Touch Menu Menu > Read aloud.


Many books from Google Play can be read aloud. If you don't see the "Read aloud" option, that means the book is in a format that doesn't allow it. Learn more about file types that allow reading aloud.