Unity iOS Essentials by Robert Wiebe

You will start by considering the essential differences between mobile and desktop game development. You will then get straight into creating unity projects that will run on the entire spectrum of iOS devices. This book is for people who want to plan, develop, and deploy Unity 3D games on iOS mobile platforms, including iPhone, iPod Touch and iPad. Anyone who has experience with the free desktop version of Unity 3D can pick up this book and learn how to take the desktop skills and optimize them to work on the mobile iOS platforms. Some of the features in this book discuss the Pro features of Unity 3D for iOS so a Pro license is required to use some of the features (notably Occlusion Culling and Beast Light mapping).