But that's just me. Here's why I think books are no longer being read in general.
It's simply a format that time has moved on from. First came the radio, but radio wasn't gonna compete with books. Radio was succeeded by television though, and that sure could, but television is presently being succeeded by the internet, with TV companies desperate for any remaining attention, attention that they keep bleeding.
All this time the format has failed to find a foothold, and carve out its stay. You may discover that this is not universally true across the world, such as in Japan, where light novels are decently popular. It has its own place, but in the Western world, the only reliable place books have is in the classroom. I stipulate that the reason you see a prominently female readership is for the same reason: girls are (were?) taught in school that they're the more artsy type, that humanities should interest them more, and so they proceed(ed) to take that on the chin. Fast forward a few decades, and there you go.
The same applies for all other foregone forms of art. Theater? Opera? Ballet? Classical music performances? You'd have to pay or coerce me to attend these. Where I live, all the institutions hosting these are living off of government money, as they're simply unable to sustain themselves otherwise. People just don't care. The shows put on are basically live-action museum exhibitions. Although I guess even museums should be included in this list. Modern audiences are simply completely out of tune with these, they are an exercise in anachronism. And until the communities behind these continue to hammer in their formal position in art over their actual one, rather than try to connect with said modern audiences, this trend will continue. That is assuming such a connection is even possible still at this point.