Android™ Notes for Professionals is a comprehensive guide to the Android operating system. It covers a wide range of topics, including the architecture of Android, user interface design, and application development. The book is intended for professionals who are already familiar with Android development, but it can also be used as a reference by beginners. It is written in a clear and concise style, making it easy to understand and follow. The book includes numerous examples and code snippets to help readers learn and apply the concepts covered. Overall, Android™ Notes for Professionals is a valuable resource for anyone looking to improve their skills in Android development.