Since the publication of Starting a Business, a wide variety of organizations that have adopted the Lean Startup method have continued to validate Eric Rees' ideas during the startup phase. But how to use these principles in large firms or start-ups that are already firmly on their feet? As companies grow, they become more bureaucratic, lose flexibility and innovate. So how do you fight sluggishness, keep taking risks, and keep your entrepreneurial spirit? And, most importantly, how to ensure sustainable growth? Drawing on experience working with companies ranging from tiny start-ups to multinational corporations, Rhys shares how to apply Lean Startup principles at any stage of an organization's development.