Check the copyright I believe it's a 1950s book. I think the left loves it because it's about banning and burning books. Which the left detests until students start reading conservative material then we need to ban and burn books.
Of course, I was referring to the presumed time of the events in the book. This is not explicitly indicated, but furthermore, I don't see any discussion of it by internet search.
I think it has to be presumed to be the "near future" from the time of writing, since the whole thing was a commentary on contemporary trends, as seen by the author, and I'll stand by the 1980's as a general time frame.
Whatever the case, our technology and culture have evolved well past the sociological and technological presumptions of the book, and I don't see how the novel can stand as any kind of warning to us in this era.