There are some possibilities to free a Book from DRM. I just ask as a engineer out of technical interest!
And there are different reasons people doing this. Some want do use their bought amazon books also on other devices [
snip]. But if it has a DRM they cant change the format in calibre etc. etc.
Or people who use the comment or text marker function of a kindle and they are angry because they can only mark a restricted / limited amount of text. etc. etc.
For example what is the difference from these to ways? How can people be sure that this plugins have no virus or trojan or malware? Which one is the best way? Are there better plugins for calibre?
1.
https://apprenticealf.wordpress.com/...3-4a-released/
2.
https://www.youtube.com/watch?v=XtWmxw-Uah8
Best Regards