I'm interested in ADE 3.0 and the new copy protection... are any books available that use it? I'm still wondering how it will work, will it have the new copy protection on the PC files, but still export something compatible with old (pre-2014) readers?
I had my first "unreadable" book today, a free book downloaded from ebook.de using ADE 3.0. It was downloaded fine, ADE 3 can read it fine, but - unlike other books I tried, ADE 2 can not read it, nor can Calibre (and it can read all other ADE books

), or anything else.
This could be a new copy protection (content server is 4.2), or just as likely, a bug in ADE 3.

Others were able to download the book with ADE 2 and it works for them.