I actually wrote a couple of blog posts on this very topic for the O'Reilly Network which I still believe are probably one of the most extensive collections of

I actually wrote a couple of blog posts on this very topic for the O'Reilly Network which I still believe are probably one of the most extensive collections of links to free resources on the web for learning Lisp. You can read over them here ( part 1 - http://www.onlamp.com/pub/wlg/8397 http://www.onlamp.com/pub/wlg/8397 and part 2 - http://www.onlamp.com/pub/wlg/8595 http://www.onlamp.com/pub/wlg/8595). Also, I've recently gotten back into lisp once again myself--although this time I am going the scheme route--and I am currently reading through R. Kent Dybvig's book The Scheme Programming Language and I'm finding it to be a truly excellent book and it is also free online here http://www.scheme.com/tspl3/ http://www.scheme.com/tspl3/. And of course make sure you take a look at the Arc tutorial (http://ycombinator.com/arc/tut.txt http://ycombinator.com/arc/tut.txt) and the blog.arc and news.arc source code as they will have you up and running with a Lisp powered website in no time. Anyway, good luck with your studies, I think the rewards are well worth the effort. I can honestly say no matter how long I've been away from lisp I always find myself going back and loving it even more each time.