Write CSS without worrying that overzealous, pre-existing styles will cause problems. MaintainableCSS is an approach to writing modular, scalable and of course, maintainable CSS.
MaintainableCSS is not something you can download. It’s a set of principles, guides and conventions that help you write CSS for large or small scale websites. If you have ever experienced pain in maintaining CSS, this book can help you avoid common problems. Whether you’re in a team of 1 or 100, I think you will find useful advice in this book. Even more so if your site is constantly evolving. You can read the entire book in under 20 minutes and apply the rules in minutes.