Reviewing this book in a flash, I found that the groupings for the topics are based on the problems, not on the functions as many manuals usually do. That is what makes this books is so easy to use when you have an ongoing trouble with your script coding.
Contents of the Jquery Cookbook
As a fan and user of Jquery myself, I will have this book very close to me. As they said,
'Getting started with the jQuery library is easy, but it can take years to fully realize its breadth and depth'
You can save yourself a lot of time if you master the predefined built in functions that are available in the Jquery libraries, which I know this book will provide it to me.
Buy this book: http://oreilly.com/catalog/9780596159771/