Jeremy Keith does a wonderful job making a pretty complex topic easily understood and his sample code will probably make its way into many future projects. But beyond giving the reader mere code though, his examples reveal the possibilities of DOM Scripting. This book is probably the best example I’ve ever read of making a complex coding task easy to understand.
Of course, the book has a site that you might want to check out. There is a sample chapter there for you to read. One really cool freebie that shouldn’t be overlooked is the complete reference section of the DOM Scripting book for your iPod. Be sure to check it out.
I’ve also just picked up his follow-up book, Bulletproof Ajax. I’ll let you know how I like it. I’m about 30 pages in right now and it’s living up to my expectations already.