This book is designed to make readers proficient in Objective-C and provide a deeper understanding of key concepts needed to build OS X and iOS applications. The author Jonathan Lehr takes a step-by-step approach, and readers will learn by doing, with labs at the end of chapter to reinforce the concepts covered. Starting with the fundamentals of ASNI C and Objective-C, Jonathan will show readers how to create and use Objective-C objects and classes. He provides a solid introduction to dynamic binding and the Objective-C runtime, and readers will become familiar with Foundation framework classes and APIs. Jonathan also dives into troubleshooting techniques and covers advanced topics such as Advanced Key-Value Coding and Grand Central Dispatch.