用1.5年时间读完了此书(虽然前1年都没真正看完第一章，最后对ATN和Prolog这两章也只是大概的略读)。阅读此书的过程颇为享受。On Lisp是一本值得反复拜读的经典。
本书的关键情节都在On Lisp的这个On上面！
最后推荐理由，来看看Peter Norvig在Amazon上对此书的评论：
"When I find something really interesting in a book that I want to remember later, I write the page number on the end page. A good book might get 5 to 10 page numbers so noted. My copy of On Lisp has 25."
http://www.amazon.com/review/RRFAH7G81ASUL