Any legal means is fair and square to confront a moral atrocity.
What legal grounds is there for a lawsuit?
They do. Its called the Turner Diaries. The author, Andrew McDonald is the nom de plume of William Pierce, former head of the National Alliance, the most organized Neo-Nazi group in the United States.
But when something is so blatantly immoral, and may well actually lead to the increased sexual rape of children, that crosses my line - and a great many others' as well. Just like a book calling for the elimination of Jews, homosexuals or blacks would cross most people's lines (and, as I said, which I doubt Namblazon would sell).
If the authors book makes a political argument, it is perfectly legal to sell. If the author openly suggests the commission of crimes by the reader, thats another. If you dont want Amazon to carry the book you have every right to boycott them. Good luck. Amazon knows they will lose a lot more business if they decide NOT to carry such material.
I personally find censorship deplorable.
Beware of he who would deny you access to information, for in his heart he dreams himself your master
-Sid Meyer