Currently I have Kochan's Objective-C 2.0, I haven't started in yet (except for the introductory chapter) as I am still waiting for my macbook to arrive and I sold my mac mini a while ago. I also have a book "Cocoa programming for mac os x" and "Beginning development for the iphone". I am wondering if I should also get a book on C, I noticed Kochan has one out, and there is another one that seems to be very popular by Kernighan (C Programming Language). Any recs on whether I should pick up another book? I don't know how in depth Kochan goes into C in his objective-c book so I am just curious how anyone who started out with the book felt. I have a pretty firm grasp on object oriented concepts, but C++ is the lowest I have went in programming languages with most of my time being spent on C#.