Flex 3 Books Remommedation

Before i start down with ESRI FLEX API i had to start with Flex itself, having a Adobe Flash 8 Experience, i didn't find it much difficult, but with some new concepts and it was easy to grasp.

I would recommend the following book to anyone starting Flex 3 with Adobe Flex Builder.

OReilly.Learning.Flex.3.Jun.2008 (Read This First)
O'Reilly - Flex 3 Cookbook - May 2008
Oreilly Getting Started With Flex 3 Jun 2008


UPDATE

To get ur self more familiar with the contols and how to apply style to them i recommend the following links

Flex Component Explorer

Flex Style Explorer

ArcGIS Server Flex API

I started missing around with ArcGIS Server Flex API, as a UI, its perfect but with very limited functionalities, of course everything can be achieved but with web services,

be tuned for some tutorials.