This is a little book that encapsulates my current thinking on how best to write and maintain CSS codebases for rapidly changing, long-lived web projects.
There is no framework to download
There are no requisite tools (although there are opinionated guidelines for what tooling should provide)
Nothing is written for you
Put metaphorically, Enduring CSS is not giving you fish; it's teaching you how to fish.
It's a methodology for writing CSS that once implemented, will provide your project with a predictable, and easy to maintain CSS codebase.
The earliest iterations of Enduring CSS were first documented in August 2014, in the blog post, Enduring CSS: writing style sheets for rapidly changing, long-lived projects (https://benfrain.com/enduring-css-writing-style-sheets-rapidly-changing-long-lived-projects/).
However, the ECSS approach has developed a little since then and so this book should be considered the canonical resource on the approach.
I hope you enjoy reading it.
Ben Frain