For anyone not able to quickly locate the above mentioned items:-<p>PCL: (Practical Common Lisp): <a href="http:&#x2F;&#x2F;www.gigamonkeys.com&#x2F;book&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.gigamonkeys.com&#x2F;book&#x2F;</a> (chapters 16 &amp; 17)<p>Keene: (Object-Oriented Programming in COMMON LISP: A Programmer&#x27;s Guide to CLOS): <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;Object-Oriented-Programming-COMMON-LISP-Programmers&#x2F;dp&#x2F;0201175894&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;Object-Oriented-Programming-COMMON-LIS...</a><p>Warp Speed intro: <a href="http:&#x2F;&#x2F;xach.com&#x2F;lisp&#x2F;jrm-clos-guide.html" rel="nofollow">http:&#x2F;&#x2F;xach.com&#x2F;lisp&#x2F;jrm-clos-guide.html</a>