Head First Kotlin is a comprehensive and user-friendly book that serves as an excellent introduction to the Kotlin programming language. It emphasizes a hands-on approach to learning, allowing readers to dive into coding right from the beginning. With its engaging and visually appealing format, this book presents concepts in a way that is easy to understand and retain.

As we know, the production process of software is: analysis, design, programming, testing, and deployment. In the past, the analysis and design of software were separated. As a result, the results of software requirement analysis cannot be directly designed and programmed, while the code that can be programmed and run distorts the requirements, causing customers to find that many functions are not what they want only after running the software, and the software cannot quickly follow the changes of requirements.

As is known to all, Robert C. Martin is an expert in software development, software engineering master, and specialist of object-oriented technology enjoying the worldwide reputation. Also, he is software engineer and one of the pioneers of design patterns and agile software development movements. Agile Principles, Patterns, and Practices in C# was written by him and his son Micah Martin (an experienced software engineer). The Java edition of this book has won the highest honor of computer books - Jolt Awards.

Design Patterns (written by 4 internationally recognized experts in the field of object-oriented software design) has become one bible or must-have dictionary for object-oriented technicist. 23 patterns with the most valuable experiences it summarized and concluded from OOD have become the essential basic knowledge and vocabularies of software development technology exchange.

Essential C# has always been widely acclaimed as one of the must-read C# related classic books. The content throughout the book is comprehensive and systematic, and the structure is clear and concise. All was so carefully choreographed that the writing and examples are impeccable. In a word, it is seen as one of the preferred works for learning C# language.