You can't learn lisp with PCL. You can marvel and say ohhh Lisp can do that kind of stuff! But you can't really learn the language with a handful of pre-made examples.

To learning lisp I recommend: http://www.cse.buffalo.edu/pub/WWW/faculty/shapiro/Commonlis...

Notes: YOU HAVE TO DO ALL EXERCISES. Just reading the book teaches you very little.

After this, you can go and read On Lisp (the Uber-Programmer Lisp book) and understand it perfectly in the first read.