> Is it because it's a book? Is it because it's a medium that hasn't really been censored like this before? Is it because it was done posthumously? Is it the specific content being censored?

It's because it is fraud. I want to buy a copy of Roald Dhall's original work - unadulterated by leftist wankers.

If censorship is required when reading to my children, I'll be the one to decide how to do it.

If they want to tone police literature, let them produce their own dull sanitised works and see if anyone wants to buy them. But they know that noone does want to buy them, hence why they have to mutilate someone else's work instead.