URLLINK.acsm?

Clicking on the link gives option to open the link in Adobe Digital Edition App.

( Make sure it's downloaded from Play store )

FInd the link here to understand more about acsm files.

ACSM Files – What they are and how to work with them | eBook Reader Software

Hi, we have the same issue, but I'm working on it by downloading this app from Adobe . This is what you need to do first...

Download Adobe Digital Editions 4.5! This application is designed for simplified management and reading of eBooks. It can be used in conjunction with screen reading software for vision impaired users.

This application is designed for simplified management and reading of eBooks. It can be used in conjunction with screen reading software for vision impaired users...

-Automatic download of books across devices

-Adobe Digital Editions 4.5 provides the ability to sync your DRM-enabled books across all your devices. Therefore, if you purchased a book using one device, you can now easily access the book on all your other devices too. This feature is enabled by default (you can turn it off through Library > Preferences (Windows) or Adobe Digital Editions > Preferences (Mac OS)

eBook  Formats Supported

ADE 4.5 supports EPUB 3.0,  including its four specifications:

  -EPUB Publications,

      -EPUB Content Documents,

    -  EPUB Open Container Format (OCF),

      - and EPUB Media Overlays

I am having exactly the same problem and would appreciate, if anyone answers, to include me.  Thanks