The book "Refactoring Using Patterns" presents the results of many years of experience of a professional programmer in the use of design patterns (patterns). The author's approach to design is to avoid both under- and over-design, constantly analyzing ready-made working code and reorganizing it only when this will lead to increasing its efficiency, simplifying its understanding and maintenance. Design patterns are not a panacea, so there are situations where such reorganization should be done using design patterns and situations where the best solution is to avoid them. The author, based on both his own and other people's experience, examines in detail the various signs of code that requires refactoring, describes which refactoring is best suited for a given situation, and describes its mechanics, analyzing it in detail using specific examples from real problems. The book "Refactoring Using Patterns" can be considered both as a textbook on refactoring for an intermediate level programmer, and as a reference guide for a professional, which can suggest which decision should be made in a given difficult situation.