A quick note from Amazon:
jQuery: Novice to Ninja is a compilation of best-practice jQuery solutions to meet the most challenging JavaScript problems. In this question-and-answer book on jQuery, you’ll find a cookbook of ready-to-go solutions to help breathe life into your web page. All code used to create each solution is available for download and guaranteed to be simple, efficient and cross-browser compatible. MARKET INFO jQuery is one of the most trusted and popular JavaScript frameworks for rapid development of rich web pages with minimal fuss and maximum compatibility. jQuery significantly simplifies the process of building complex JavaScript solutions and has been embraced by both hobbyists and professional developers around the globe.
I don't know if I should buy this book or not, because many features listed above seem very similar to the jQuery Cookbook's ones. However, this is a SitePoint book, and I always got useful tutorials and guides from this site. I think I should consider it really carefully. Anyway, it doesn't cost so much, so I think that I'll probably take it.
PS: If you've read this book, please let me know how did you find it.