# Design Patterns [Design Patterns: Elements of Reusable Object-Oriented Software](https://www.goodreads.com/book/show/85009.Design_Patterns) #book [*Dive Into Design Patterns*](https://refactoring.guru/design-patterns/book) #book - "**Design patterns** help you solve commonly-occurring problems in software design. But you can’t just find a pattern and copy it into your program, the way you can with off-the-shelf functions or libraries. A pattern is not a specific piece of code, but a general concept for solving a particular problem. They are like pre-made blueprints that you can customize to solve a recurring design problem in your code." [Head First Design Patterns](https://www.goodreads.com/book/show/58128.Head_First_Design_Patterns) #book - by Eric Freeman, Kathy Sierra, Bert Bates, Elisabeth Robson [Introduction to Algorithms](https://www.goodreads.com/book/show/108986.Introduction_to_Algorithms) #book - by Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, Clifford Stein [Refactoring to Patterns](https://www.goodreads.com/book/show/85041.Refactoring_to_Patterns) #book - by Joshua Kerievsky, Martin Fowler (Foreword by), Ralph Johnson (Foreword by) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://brain.nathanarthur.com/self-study/design-patterns.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.