Making pdf or epub from google books without acsm - Help

[Ready2]

Hello everyone!

So I've noticed that some of the books I have purchased on google books do not allow downloading acsm files for pdf or epub so basically they are only viewable in the browser or on a mobile device.

I have done a bit of searching and found that on my phone after downloading the books they are stored in internal storage/data/data/com.google.android.apps.books/files/accounts/{google account name}/volumes
Each has its folder with the cover picture file and a res2 and segments folders. I have exported them to my PC but they seem to be encoded.

My question is: does anyone have an idea how they could be made into an epub or something that could then be loaded into Adobe Digital Editions (and then calibre to dedrm) so I could view them in something better than google books' viewer in the browser?

Thanks!