Why link to the old, unmaintained version if the https://github.com/LispCookbook/cl-cookbook fork is actively updated?

Once I realized, it was too late to edit the submission. Thanks for posting the GitHub link.

Pretty sure (from the chapter titles) this is the same project as https://lispcookbook.github.io/cl-cookbook/ — which has last commit 9hrs ago, rather than 2007 =)

Changed now from https://cl-cookbook.sourceforge.net/index.html. Thanks!