Hello is it possible somedays make book compresion like
if you have 100 green experience book transform to higher rank book ?
I'm all for this, but I doubt it will ever happen.
Anything that shrinks the amount of used storage space is not going to be looked on favorably, when they charge gems to increase storage space, I think.
Then again they sort of do something similar with crests, so who knows. Maybe?
Another option, instead of Aetherocks, is to sell them for HB. I know at lower levels, this is a far more useful way of clearing extra books, if you don't have any heroes who need them.
For instance when your main set are waiting for Upgrade due to lack of HB.
Move along, please.