I struggled with jQuery in Action because I felt it was more of a reference manual as opposed to a tutorial. Maybe a year ago it was the best reference/tutorial, but now there are a bunch of other alternatives.
On the other hand, I really enjoyed the book Javascript: The Missing Manual because I felt it had better examples. Don't let the title of the book fool you, after a quick introduction to JavaScript the author introduces you to jQuery and uses jQuery for the rest of the book.
I also purchased two PDF Books from Packt Publishing :
1) Learning jQuery 1.3
2) jQuery UI 1.6: The User Interface Library for jQuery
Both are recent publications and well written. You can often find "percentage off" discounts from your local user group or on the internet to apply to the purchase price of the downloadable PDF books.
If you're looking for a single book that covers both jQuery and the jQuery UI project, then this Wrox book might be useful: Beginning JavaScript and CSS Development with jQuery. A quick google search revealed that you can browse some of the contents of the book online at: Google Book Search - Beginning JavaScript Development With jQuery
By Richard York
I would actually recommend learning from samples posted on the web. There are a bunch over at:
Learning jQuery - a site related to the Packt book listed above
Encosia - ASP.NET, AJAX and more
ASP.NET and MVC jQuery related posts at Haacked
Rick Strahl's Web Log