So I've read a few books and many of them recommend reading some fiction to strengthen my imagination. I read quite a bit of fiction when I was younger, but now that I am older I am not so sure I will be interested in knights killing dragons and rescuing princesses. With all that being said, what are some recommendations of books that will strengthen my imaginative powers.
I can recommend at least these 2:
The Diamond Age: Or, A Young Lady's Illustrated Primer
&
The Mammoth Book of Extreme Science Fiction
Mostly otherwise I've tended to favor extreme yet hard varieties of fiction/fantasy. For ideas I check out
http://www.projectrho.com/public_html/rocket/
It has gotten a bit faggy since paetron became a thing and is bluepilled on a few others things, however it's still overall great reference for pushing the boundaries of imagination.
H.P. Lovecraft will get your imagination going.
> I am not so sure I will be interested in knights killing dragons and rescuing princesses
Myths and legends are still good as an adult, if you can read them in the right way. Maybe try the Greek myths if you don't like that Arthurian knights and dragons vibe.