I would bet on "structure and interpretation of computer programs". You can read it online: https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/bo

I would bet on "structure and interpretation of computer programs". You can read it online: https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book.html https://mitpress.mit.edu/sites/default/files/sicp/full-text/... Oh and "The Art of Computer Programming" series by Donald Knuth