I'm intrigued by the comments here that suggest that the theme is obscure. In the US, the work in question routinely makes "Top Ten .... of All Time" lists (I've seen it ranked as high as #2), and is nearly unavoidable if you pay the least bit of attention.
I am not quite sure it is #2 of all time, but it is very much worth engaging with if you have the time and inclination to do so.
(I think I have carefully tiptoed around the nature of the work)