Thank you Wes for the reply,
For the first suggestion you made
I saw the broadcast and Reply
Broadcast - DSNP Specification
for the broadcast, it seems you can have activity content types
which has audio/video/image/link
So i assume the link will be to an epub. then? It isn’t a physical attachment as much as a linked attachment. am I correct?
For the second+third suggestion you made , you confirmed what I felt in the back of my head. That an entire service will need to be built to make this possible.
You have helped me 100% I will try something and see.