SICP does the job of demonstrating the Closure-Object relationship just as fine, without boring the reader with endless references to the superiority of Lisp, as Let Over Lambda does.
"Let Over Lambda is one of the most hardcore computer programming books out there. Starting with the fundamentals, it describes the most advanced features of the most advanced language: Common Lisp. Only the top percentile of programmers use lisp and if you can understand this book you are in the top percentile of lisp programmers. If you are looking for a dry coding manual that re-hashes common-sense techniques in whatever langue du jour, this book is not for you. This book is about pushing the boundaries of what we know about programming. While this book teaches useful skills that can help solve your programming problems today and now, it has also been designed to be entertaining and inspiring. If you have ever wondered what lisp or even programming itself is really about, this is the book you have been looking for."
I should have known better when I ordered the book.
Hoyte's first intention, writing a 2nd Volume for Paul Grahams On Lisp, which goes into detail about macros, is actually quite good. It just does not live up to "Volume 1".
And about the 1 percentile and "only the best" talk: Lisp and Lisp Macros are not really "magic". They are accessible to programmers like you and me and if someone does not bother to write them it is not about lack of understanding, but lack of time it takes to write them properly.
Thanks for the reference. I will check out that and SICP[1] as mentioned by one of your replies.
It was the Austin Meetup. The name of the presenter escapes me, but it was great overview. The topic wasn't meant to be CLOS, it was just mentioned in passing, which was why I was hoping that it was the topic of this article.