Nat Pryce is a co-author of "Growing Object-Oriented Software Guided by Tests". An early adopter of XP, he has written or contributed to several open source libraries and tools that support TDD and was one of the founding organizers of the London XP Day conference. He works programmer, architect, trainer, and consultant in a variety of industries, including e-commerce, media, telecoms, finance, retail and marketing communications. He has delivered business-critical systems that range from embedded devices to large compute farms supporting global business.