Also, I can highly recommend the book Common Lisp Recipes by Edi Weitz. I literally laughed out loud in Section 9.7 "Recursive Processing of FORMAT controls". T

Also, I can highly recommend the book Common Lisp Recipes by Edi Weitz. I literally laughed out loud in Section 9.7 "Recursive Processing of FORMAT controls". The idea of combining FORMATTER, user-defined FORMAT controls, and recursive formats makes me want to create a new language with only the FORMAT command. It could rival APL for being write-only.