If you’re building web sites, and you have any interest at all in making them accessible to people with vision, mobility, or other impairments, you need to read this book. Clark’s style is emphatic and sometimes haughty, but also caring and filled with pointed humour and dry sarcasm. The book covers the full spectrum of web accessibliliy techniques in exhaustive detail. Not only does Clark tell you what you should do, but also why you should do it–that’s what makes this such a valuable reference. Even a little accessibility can go a long way; this book tells you exactly what you need to know to implement it.