The Lean Startup by Eric Ries is a must-read for any business owner or entrepreneur looking to optimize their budgeting strategies. This book introduces the concept of lean startup methodology, which focuses on rapid experimentation, validated learning, and iterative product development. Ries provides practical advice on how to build a sustainable business by testing assumptions, measuring progress, and adapting quickly to market feedback. With real-world examples and case studies, this book offers valuable insights into effective budgeting techniques that can help businesses of all sizes thrive in today's competitive landscape.