Pattern: How to Create Effective Design Patterns is a book that takes a detailed look at a variety of programming and design patterns that help developers create efficient and easily maintainable code. The authors of the book share practical advice and examples of the use of various patterns that help improve the structure of the software and avoid common mistakes. In the Pattern book, you will learn the basics of working with different types of design patterns, such as Singleton, Factory Method, Observer, and many others. The book will be a useful reference for developers of all skill levels, from beginners to experienced professionals, who seek to improve the quality of their code and the efficiency of software development. The Pattern is not just a book of theoretical concepts, but also a practical guide with examples to help you understand how and when to apply different patterns to achieve programming success.