Z:gnu-www-ja-ebooks-must-increase-freedom--695cd5-I couldn't do that with most c/en

I couldn't do that with most commercial e-books. It's &ldquo;not allowed&rdquo;. And if I tried to disobey, the software in e-readers has malicious features called Digital Restrictions Management (DRM, for short) to restrict reading, so it simply won't work. The e-books are encrypted so that only proprietary software with malicious functionality can display them.