Thank you, looks great!

Have you seen Behind the Parentheses, by Mark Jones Lorenzo? It goes into quite a lot of technical details about how things like eval/apply were implemented for example, and the larger academic and business contexts eg FORTRAN and earlier language development.

I’m a Lisp newbie (and mostly here for the Emacs Lisp) so a fair amount was beyond me, but I still found it quite readable and interesting.