Eric Ries' book The Lean Startup which outlines a new method of management called Lean Startup. The method proposes that startups should focus on validated learning, which means they should test their assumptions about their business models by building minimum viable products and measuring their performance using actionable metrics. The book argues that traditional management methods are not well-suited for startups because they are based on assumptions of certainty and predictability that do not exist in the real world. It advocates for a more iterative approach to product development, where startups can learn from their mistakes and pivot their strategy as needed. It also explores how startups can scale their businesses while maintaining their agility and learning orientation, and how established companies can foster a culture of innovation.