Lisa Crispin is a founder of the Agile Testing Fellowship: https://agiletestingfellow.com Lisa is a co-author of Testing eXtreme Programing: https://www.amazon.com/Testing-Extreme-Programming-Lisa-Crispin/dp/0321113551 Other mentions: The Strangler pattern for legacy code rescue: https://martinfowler.com/bliki/StranglerFigApplication.html