This book introduces the Swift 4 programming language and its application in developing applications for Apple's iOS platform. It is designed for individuals with no prior programming experience, guiding them through the fundamental concepts of Swift and the Xcode Integrated Development Environment. The content aims to equip readers with the necessary skills to start building their own iOS applications.

The book is positioned as an introductory text for absolute beginners in Swift 4 and iOS development. Its focus on foundational concepts and practical application suggests it aims to provide a clear and accessible entry point into the subject matter. The structure likely guides new programmers through the initial learning curve of a complex development environment. The authority perspective is that of a technical curator, assessing the book's scope and intended audience based on its stated purpose.