This book examines the international investment agreements and the dispute settlement mechanisms contained therein, which bind the Gulf Cooperation Council member States.The Gulf Cooperation Council (GCC), comprising Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emirates, is complex and unique. Recently, all member States have experienced increasing investor-state arbitration claims, while their nationals are increasingly instituting investor-state arbitrations to protect their own foreign investments. Intra-GCC disputes, though relatively rare, have also appeared, largely as a result of the recent Gulf crisis. While focussing particularly upon the investor-state dispute settlement experience of member States as respondents, the book also explores the experiences of their nationals as claimants to determine how they can approach investor- state dispute settlement in the future. The book also reflects on existing treaty-making practices, making recommendations for regional-level dispute settlement to improve upon investor-state dispute settlement outcomes.This book provides a detailed analysis of the global investor-state dispute settlement regime and international investment agreements, and it will be of interest to students, academics, and practitioners with an interest in international investment law and arbitration.