I second this idea. Recently, I started reading fictions again and it is very different cognitively than digesting information from a non-fiction book.

For what it's worth, my favorite fiction author is Kurt Vonnegut. His books are fun and pretty accessible.

Something I did when I was younger, in my quest to be less of an idiot, is have multiple books going at once. I'd rotate between fiction, science, philosophy, etc. If there's minimal overlap between the books it's easier.