I'm not sure Common Lisp has evolved very far in the last 20 years, honestly -- that seems to be part of the value proposition, though I don't quite understand

I'm not sure Common Lisp has evolved very far in the last 20 years, honestly -- that seems to be part of the value proposition, though I don't quite understand it. I do recommend On Lisp for people who want to understand and get a feel for lispy ways to solve problems... but, fair warning: I did already have a very solid grasp of programming in general via C, C++, Python, O'Caml, a little bit of Haskell (at the time) when I read it. So... YMMV. If you want a good book on paradigms in general, I'd recommend something else.