I have a lot of books now about web design (as opposed to the coding/programming side of things) but really the first edition of Creating Killer Web Sites was probably the first book which helped to open people's eyes to the possibilities of good - or at least, not-indifferent - design on the web. I have both editions, and still refer to the 2nd edition and visit the web site whenever I feel the need for little inspiration. No I do not necessarily think that all of David Siegel's designs - or the designs he likes - are "good" per se, or to my taste, but at least, they get you thinking in different directions. Nowadays of course there are plenty of other books in this genre - most notable among them perhaps is HTML Artistry - with more up-to-date technical information, but Creating Killer Web Sites is still a very worthwhile addition to any serious web or online-based designer's bookshelf. And I do hope there's a new edition in the works :)