I'd add this one to the list, filed under "Software Engineering": https://www.cosmicpython.com/ https://www.cosmicpython.com/ It's published in dead tree form

I'd add this one to the list, filed under "Software Engineering": https://www.cosmicpython.com/ https://www.cosmicpython.com/ It's published in dead tree form by O'Reilly, but the authors also made it available online and gave it a CC-By-NC-ND license. Full disclosure: I haven't read this deeply, but I've skimmed it, and it looks interesting enough that I want to read it deeply.