Arizona's corrections department prohibits inmates from receiving publications that contain any depictions or descriptions that would incite or facilitate a riot, a resistance or stopping work. They also can't contain pictures, illustrations or text that encourage "unacceptable sexual or hostile behaviors." Any publications with sexually explicit material or sexual representations of inmates and law enforcement also are not permitted. Corrections spokesman Andrew Wilder said the department had not yet received the ACLU's letter asking for the ban to be reversed and declined further comment Monday. https://www.nbcnews.com/news/amp/ncna1008686? I’m going to assume there’s no bad intentions here but it still seems dumb. As far as I’m aware there isn’t an epidemic of inmates rioting in prison because of the books they’re reading.