Thanks for the quick response
Also, what about adding this "Essential Lisp" by John Anderson, Brian J. Reiser and Albert T. Corbett
Regarding Portacle, the author claims that it's unmaintained: https://github.com/LispCookbook/cl-cookbook/issues/587
Code frequency graph: https://github.com/portacle/portacle/graphs/code-frequency
Maybe it might be good to remove it from the sidebar as the very first link under IDEs for CL?