Cascading Style Sheets (CSS) is cornerstone web technology which enables beautiful web pages across a range of devices. CSS was first proposed by Håkon Wium Lie while working with Tim Berners-Lee at CERN in 1994. Since then, CSS has added many features, and most of the information you read today will be presented by a CSS rendering engine. The exception may be paper-based books, magazines and newspapers. But this may be about to change as CSS in implemented by an creasing number of print-centric rendering engines. During the talk, you will be challenged to write a book in HTML and CSS.