Introduction - If you have any usage issues, please Google them yourself
ExtJS books
APress Practical Ext JS Projects with Gears.pdf
Ext JS 3.0 Cookbook October 2009.pdf
Ext JS in Action.pdf
Packt - EXT JS 3.0 Cookbook (10-2009) (ATTiCA).pdf
Packt Publishing Learning Ext JS.pdf
Wrox.Professional.JavaScript.Frameworks.Prototype.YUI.ExtJS.Dojo.and.MooTools.Aug.2009.pdf