Just thought I'd post a rather more positive review than the two-star one posted earlier (at the time of writing the only other review of the book on amazon.co.uk). This is an essential introduction to best practice web design methodology.
This was one of the first books to appear to cover responsive web design techniques. There are now a few others, but this is still one of the very best. Worth getting for the first couple of chapters alone, which will remain relevant so long as designers care about making future-friendly websites.