Here's a collection of some useful Common Lisp resources that I've come across recently.
- Getting started with Common Lisp
A useful introduction to the basics of using Common Lisp for the n00b.
- 9 of the Best Free Lisp Books
A description of and links to 9 free books about Lisp. It even includes a guide to programming the Lisp Machine, a nice resource for history buffs. The rest of the books are more directly applicable.
- Articulate Common Lisp
A site dedicated to helping CL newcomers overcome the steep learning curve. The site has been down the last couple of days but there is a github repository that has the content.
- The Rob Warnock Lisp usenet archive
Curated by Zach Beane. There are 3,265 articles arranged by year and also searchable.