Bert Altenburg, author of AppleScript for Absolute Starters, in co-operation with Alex Clarke and Philippe Mougin, has released a book for newcomers to Cocoa programming using Objective-C and XCode.
This tutorial is written for non-programmers, and is aimed at levelling the learning curve as much as possible. In the best tradition, BecomeAnXcoder is released as a free booklet in pdf format under a CC Attribution license. It is also available online, simply follow the links below.
links for 2010-12-16