Despite careful planning, projects often deviate from their assigned paths. Delays, cost overruns, benefit underruns, stakeholder disappointments, and sustainability shortfalls are common challenges during project initiation and execution. The Cambridge Handbook of Project Behavior addresses the underlying causes of project behavior and misbehavior, while offering evidence-based strategies for remediation. Featuring guidance for anticipating project outcomes and practical advice for dealing with projects when they branch off assigned paths and veer off track, this Handbook is a valuable resource for practitioners, policymakers, and project professionals responsible for delivering high-profile and complex projects. It includes contributions from leading experts in the field of project management, providing a unique international perspective. As mega-projects become increasingly prevalent on the global stage, understanding the dynamics of project behavior and misbehavior has never been more critical. The Cambridge Handbook of Project Behavior offers essential insights and solutions for successfully navigating the challenges of project management.