I would like to take this opportunity and recommend the Modern Fortran book by Milan Curcic: https://www.manning.com/books/modern-fortran.
Your examples are fun to follow and step out of the regular day-to-day distributed computing comfort zone.
I mentioned your book in my post on Fortran: https://gruchalski.com/posts/2022-08-28-i-enjoyed-modern-for....