My last posting was about sin, so ignorance seems to be a logical next step. Those who try to ban books seek to reinforce their own ignorance and to share it with others. Almost anything written that is at all interesting will be offensive to someone. Rather than grapple with the offensive ideas, some prefer to bury them.
This map represents recent challenges in the U.S. To be honest, the pattern is not what I expected. Except for Southern California, it is rather representative of the distribution of population. This should not have suprised me, as efforts to ban books come from both the left and the right, the blue and the red.