Check out http://www.cs.northwestern.edu/academics/courses/325/readings/graham/graham-notes.html http://www.cs.northwestern.edu/academics/courses/325/reading...

Check out http://www.cs.northwestern.edu/academics/courses/325/readings/graham/graham-notes.html http://www.cs.northwestern.edu/academics/courses/325/reading... for notes on where Graham's lisp style is notably weird. It also helps to keep in mind that ANSI Common Lisp is not really about ANSI Common Lisp, but an ideal Lisp that doesn't exist. To actually learn Common Lisp (which I can heartily recommend), try Paradigms of AI Programming (despite the title, it's not especially an AI book) or Practical Common Lisp. CLOS is also well-covered by Sonya Keene's CLOS book.