I have taken a series of notes in a book that I read on Google Play books. Is there a way to export these notes all together as a text document or some similar format?
Google has changed this and now if you have Android device you can get your notes on Google Drive. Simply do this:
This feature is still not perfect. The biggest problem I have is that page number is not recorded properly for most books. Instead, you just have link that opens the page in Google Play Books. Meaning, it'll probably work for you personally, but sharing notes and making sense of notes on different devices is problematic.