Get your dry and boring HTML and CSS knowledge somewhere else. This book may be short, but it's fun, informative, engaging, filled with practice/zombie killing, and free!
It's also written by a working web developer who teaches HTML and CSS at the college level and he¿s been published in professional web developer publications (Smashing Magazine et al). He has the bona fides to bring the knowledge, the writing skills to get you engaged, and the silliness to keep you laughing while you learn.
The zombie references and jokes aren¿t just cheap throw-away references, though. They actually help you understand the content better through analogies (and by keeping you awake).
So stop gawking, hit that nice red "Add to My Books" button, and lets beat down some zombies!