I think this is one of the better written technical books I've ever read. I was able to easily read through the content, and had very little difficulty understanding what was meant. I would recommend that anyone new to AJAX pick up this book when getting their feet wet. There are a few times when it is obvious that there are many authors of this book, and I would recommend to the authors of the book that they coordinate better what each other is writing. A few of the chapters seemed to intro in about the same way, and it seemed the authors had not read each other's chapters. Overall, I believe this to be a great book.