Hmm, as I write this I just heard that Apple has introduced another language as the preferred one going forward for developing for the iPhone. Objective C will be deprecated ! Not through any deficiency of this book. The authors do a good job explaining nicely the virtues and ease of coding in Objective C via the IDE of Xcode. So there is a meta question to be decided by you. Do you want to commit your resources to this language or transition to the new one. At least if you decide to stick with Objective C, try this book as a useful supporting explanatory text. It takes you through the frameworks and APIs furnished by Apple. Along with a detailed introduction to the concepts of object oriented programming. For the readers new to OO, the emphasis here is on graphical code that uses OO. Which may be easier than working through more abstract OO examples, where you are dealing with non-graphical data structures. The book shows how to make a program from parts that access each other via interfaces. The structure hiding of classes and the deliberate restriction of access to a class's members via the interface is a crucial idea in all OO coding, regardless of language. Of necessity, the text's game examples are toy snippets. No space to do any extended coding. But if you are imaginative, these are still great starting points for your ideas.