What is the title of Eric Ries’s 2011 book about building businesses through experimentation?

Eric Ries’s 2011 book about building businesses through experimentation is The Lean Startup.

The book presents a method for developing products under uncertainty. It emphasizes testing assumptions with real customers, measuring results, and deciding whether to continue in the same direction or change course.

Its best-known ideas include the minimum viable product, validated learning, and the build-measure-learn feedback loop. These concepts became central to startup culture because they encouraged founders to gather evidence before investing heavily in a full product.

The title is sometimes mixed up with Steve Blank’s customer-development work or Alexander Osterwalder’s Business Model Generation. Ries’s book brought related practices together into a widely recognized framework and helped make “lean startup” a standard phrase in entrepreneurship.