This repository contains the complete LaTeX source for 'An Infinitely Large Napkin', a comprehensive advanced mathematics textbook by Evan Chen. The project is primarily a document production pipeline: the core content is a collection of modular .tex files organized by topic (algebra, topology, analysis, etc.), with extensive cross-references, custom macros, and Asymptote figures. However, the repository also exhibits strong software engineering practices: it includes a Nix flake for reproducible builds, GitHub Actions CI/CD workflows that compile the PDF and deploy to GitHub Pages, pre-commit hooks for code quality, and helper scripts (export-flowchart.sh, print-toc.py) for generating dependency graphs and split PDFs. This hybrid nature makes it both a textbook source and a well-automated document production application.