Learning Ext JS takes a top-down approach to teaching Ext JS … this approach will certainly immerse the reader quickly into a number of common techniques used througout the framework, like XType, configuration objects and common component configuration parameters.

Chris Scott

Both Learning ExtJS and ExtJS in Action take differing paths to get to the end result of learning the ExtJS library.

Ext JS In Action, will make an excellent companion to Learning Ext JS below, since it takes a more-technical bottom-up approach to teaching Ext JS

Chris Scott

Ive noticed this myself when talking to Jay about projects, we have quite a different approach. This will definitely help the ExtJS community grow by appealing to the different learning styles of newcomers.