The Lean Startup by Eric Ries

ERIC RIES is an entrepreneurand author of the popular blogStartup Lessons Learned. He co-founded and served as CTO of IMVU, his third startup, and has had plenty of startup failures along the way.He is a frequent speaker at business events, has advised a number of startups, large companies, and venture capital firms on business and product strategy, and is an Entrepreneur-in-Residence at Harvard Business School. His Lean Startup methodology has been written about in the New York Times, the Wall Street Journal, the Harvard Business Review, the Huffington Post, and many blogs. He lives in San Francisco.