This book provides programmers with the ability to cost effectively handlecommon legacy code problems without having to go through the hugelyexpensive task of rewriting all existing code it describes a series of practicalstrategies that developers can employ to bring their existing softwareapplications under control. Working effectively with legacy code robert c martin series this series is directed at software developers team leaders business analysts and managers who want to increase their skills and proficiency to the level of a master craftsman. Working effectively with legacy code michael c feathers prentice hall professional technical reference upper saddle river nj 07458 wwwphptrcom from the library of brian watterson ptg9926858 the authors and publisher have taken care in the preparation of this book but make no expressed or implied warranty of any kind and assume no responsibil ity for errors or omissions no liability is . The seam model of thinking where you identify points you can influence behaviour without changing the code is extremely powerful feathers gives several types of seam and many techniques for exploiting them the main value of working effectively with legacy code is low risk ways to deal with untested code