Good book. I liked the hands on approach used in the chapters. Most of the topics that I needed in my projects are covered. I especially found the chapters on AJAX useful. The samples in the book work well. I would give it a 3 stars.
This book is a good reference for jQuery. To fully utilise the book, one must practise the examples at own pace. The only downside was that it was a bit lacking on the theoretical side. However, I strongly recommend this book to those wanting to learn jquery with asp.net.