books.google.com - Now you can dramatically improve the design, performance, and manageability of object-oriented code without altering its interfaces or behavior. Refactoring shows you exactly how to spot the best opportunities for refactoring and exactly how to do it -- step by step. Through more than forty detailed...http://books.google.com/books/about/Refactoring.html?hl=pt-BR&id=1MsETFPD3I0C&utm_source=gb-gplus-shareRefactoring
