They mention the Cookbook on the books page: https://lisp-lang.org/books/ https://lisp-lang.org/books/ (btw Fernando is also the one who did the initial effort

They mention the Cookbook on the books page: https://lisp-lang.org/books/ https://lisp-lang.org/books/ (btw Fernando is also the one who did the initial effort to port the Cookbook from Sourceforge to Github pages. When lisp-lang.org was released the Coobook looked bad and didn't have a lot of content).