For a more modern and up to date guide, Edi Weitz's "Common Lisp Recipes" is a great reference: https://www.amazon.com/Common-Lisp-Recipes-Problem-Solution-...

The more I use Common Lisp, the more disappointed I am that it hasn't become more popular. It really is higher level than Python, Ruby, or Perl but with nearly the performance of C and C++.