Design then Code, by Mike Rundle (@flyosity): “Lighting & Realism In Interface Design is an introduction to designing beautiful, realistic interfaces in Photoshop. It explains the physics of real world lighting, how gradients, shadows and highlights are created, and how to use Layer Styles to design buttons, panels and more. Finally, it steps through how to design interface elements from Twitter for Mac and Calcbot for iPhone.”
Mike continues to kick butt in his Design then Code series. This is a must buy for me.