HOW STANDARD EBOOKS SERVES MILLIONS OF REQUESTS PER MONTH WITH A 2GB VPS

Summary from the TLDR Web Dev newsletter

Standard Ebooks served over a million ebook downloads with a VPS, all without relying on JavaScript or a database. Instead, it used classic web technologies and PHP in an efficient manner. The ebooks are actually stored on Git repositories and an ebook build process is run on the VPS whenever an ebook is released or updated.