- Practical Common Lisp (aimed at people who know how to program in a more mainstream language already) [1]
- Paradigms in Artificial Intelligence Programming (my personal favorite) [2]
- Common Lisp: A Gentle Introduction to Symbolic Computation (aimed at absolute beginners of programming) [3]
I highly recommend the r/lisp Reddit community. Reddit as a platform has its issues, but the Common Lisp community there is very responsive and very helpful.
Lastly, you might be interested in checking out Kandria [4], a game written entirely in Common Lisp, to be released imminently on Steam.
[1] https://gigamonkeys.com/book/
[2] https://github.com/norvig/paip-lisp