非常好的一本介绍ExtJS4的书，英文版的，不过通俗易懂，强烈推荐。Chapter1:CoreJavaScriptandJavaScriptFrameworksChapter2:OverviewofExtJS4Chapter3:UnderstandingtheExtJS4APIChapter4:ControlsandLayoutChapter5:WorkingwithDataChapter6:DataControlsChapter7:DragandDropChapter8:ThemingandStylingChapter9:MVCwithExtJS4