Most books on Objective-C are rather prosaic, but I like this book's organization, which breaks the features of objective-c into nice bite size concepts. For the objective programming naive developer, this provides a nice learning curve for becoming fluent in basic paradigms of Obj-C. I would refer to Apple's latest documentation on the evolving advanced features of Objective-C, which are not covered as well by Kaplan or Mark. I would study the basic Foundation types and NS Object before diving into Cocoa or iOS. I look forward to future editions of this book to evolve into a standard primer for iOS developers just starting out in Objective-C.