Wandumthe overstory by richard powers
dune is nice if you like political intrigue and sci-fi
+1 for Good taste. U an eco person?
More science fiction-ish recommendations:
1. The Broken Earth Trilogy! (I've read the first two. Both were insanely good.)
2. U.K. Le Guins science fiction!
3. The Windup Girl!
4. I like Neal Stephenson's books, but some are maybe a bit much.
Personally didn't like the Foundation trilogy too much? I read them off-and-on over the course of like 2 years though.