Not sure you can call it censorship if it's the author of the book who doesn't want you to access it for free. I know there are a few levels of indirection here, but with a few notable exceptions authors are normally against their books being pirated.
I personally sure want Anna's Archive staying up, but comparing it to nazis burning books is a bit too much IMO
This isn't banning books, it's akin to banning a book store. If a book store chain isn't paying their taxes and gets shut down, the books have not been banned or censored.
Back in the day it was US media companies which started the big war against piracy and for the use of DRM. It was pushed by US media companies and the US government upon Europe. Same as with software patents. It's weird that now US companies complain about local media rights holders doing their censorship thing when the whole thing was started by the US.