The Lean Budget is a comprehensive guide that explores the concept of lean budgeting and its application in agile organizations. Written by Chris Matts and Olav Maassen, this book provides practical advice and techniques to help businesses align their budgeting process with agile principles. By adopting lean budgeting practices, organizations can become more responsive, adaptable, and customer-focused. This book covers topics such as budgeting cycles, funding models, and performance metrics, making it an essential resource for businesses looking to embrace agility in their budgeting practices.