Schaum's Outline of HTML

This is one of my personal favorite HTML books. It's style is really technical, so many people will hate it. For them, I would recommend a more visual book, such as HTML in an Instant, or Teach Yourself Visually HTML. Those two help you get started quickly, without getting bogged down in excessive details. But for those who like a more systematic approach, going through the individual properties of each tag, this book is for you. It has extensive code snippets, details about usage, and a very clear format. It is somewhat dry reading, but the information is really packed in there if you are willing to dig it out. Very nice.