This two-book collection brings together Eric Ries's most influential works on modern entrepreneurship: The Lean Startup and The Startup Way. Together they set out a rigorous, practical methodology for building successful businesses in conditions of extreme uncertainty, then show how those same lean principles can be scaled up to transform established, bureaucratic organisations. The Lean Startup introduced the world to concepts such as the minimum viable product, validated learning, and the build-measure-learn feedback loop. Drawing on his own experiences as a founder and advisor, Ries argues that startups succeed not through grand five-year plans but through rapid experimentation and continuous improvement. Ideal for founders, managers, and anyone curious about innovation, this set is a complete primer on lean thinking from the man who coined the term. The books are in brand new condition, published by Portfolio Penguin, and are suitable for adult readers.