Renewable energy auctions have become the dominant method for contracting utility-scale renewable energy projects, in large part due to the cost-efficient tariffs secured through this method. The ascent of auctions has been particularly rapid and transformative in the Global South, where many countries have secured renewable energy supplies at record-breaking prices. This book analyses the experiences of frontier auction markets in Latin America, sub-Saharan Africa, and India, with the aim of improving how auctions are designed and implemented globally. The book goes beyond the topic of auction design - which is concerned with the micro-economics of design choices - to include auction implementation.