[maheshbabu]

Don't look any where else other than the following books

1: Programming in Objective-C 2.0 (2nd Edition) by Stephen G. Kochan

2: Learning Cocoa with Objective-C, 2nd Edition by James Duncan Davidson

[frankus]

I worked my way through #2, and it's a good one, but there've been a lot of changes (particularly on the Interface Builder side of things) to Apple's developer tools since 2002.