In an attempt to sharpen up my jQuery, i purchased the book jQuery in Action by Bear Bibeault and Yehuda Katz. Reading through the book, i could see that the first few chapters were obviously aimed at beginners. They covered selectors (If you know CSS already your fine) and events. You can easily get this information off the jQuery doc site, nothing spectacular there. Chapter 5 covers the effects, slides and fades but goes into depth abit more on the animate function. Something (in my opinion) which is under documented on the jQuery doc site. It shows off a few different examples.

Chapter 7 is another excellent chapter – showing you how to write your own plugins. It goes into alot of detail, from extending the wrapper to proper naming conventions to looping through each element effected. This chapter is a must read for anyone considering writing their own jQuery plugins. Again, the authors have written 3 example plugins providing alot of reference material.