Sustainable Public Food Procurement (PFP) represents a key game changer for food systems transformation. It can influence both food consumption and food production patterns. It can deliver multiple social, economic, and environmental benefits towards sustainable food systems for healthy diets. This publication aims to contribute to the improved understanding, dissemination, and use of PFP as a development tool in particular in the case of school meals programmes. Specifically, Volume 2 offers extensive evidence of the instruments used to implement PFP, enablers and challenges. It aims to provide useful lessons to policymakers and practitioners involved in the design and implementation of PFP policies and initiatives, also by analysing case studies with local, regional, and national experiences from Africa, Asia, Europe, and North and South America.