This book analyses relational contract theory within the context of international energy investment agreements.Putting forth an exhaustive assessment of the field, the book provides a pragmatic resolution to the challenges inherent in the relationship between host states and foreign investors. Addressing critical queries confronting legal practitioners, arbitrators, judges, and scholars grappling with contractual imbalances, including the looming threat of expropriation, the book offers comprehensive insights. Balancing the interests of both host states and investors, the volume discusses global case studies which have proven to be efficacious and proposes a solution grounded in existing legal doctrines and practices.The book will be of interest to researchers in the field of energy law, international investment law, and contract theory and law.