Graham is a really good writer. I'm currently reading Graham's ANSI Common Lisp and hoping that On Lisp, long out of print, gets republished sometime soon.
Which is what I'm wondering about: why doesn't O'Reilly republish it? They've never, as far as I know, published a Lisp book. Hackers and Painters is a book of essays. Why no Lisp from O'Reilly? Weird.