This book focuses on the new features of HTML5 and CSS3; as such it expects the reader to have a little experience with their predecessors. But we will take things slowly, especially in the early chapters, and each feature discussed will come with example code you can try yourself. If you know what tags are and what a CSS rule looks like, then you should have few
problems. If you’re new to web development, then you’ll benefit from the short introduction to HTML and CSS in appendixes Band C.