Directors' and officers' (D&O) liability insurance policy is one of the fastest growing areas in the world insurance market. D&O insurance possesses its own rules of law, principles, and features, making it unique in both its nature and operation. Despite being both commonplace and extremely complex, very little has been published to date on this vast topic. This book scrutinizes the rationale behind D&O insurance and provides a clear and comprehensive analysis of how and to what extent company directors are protected against the myriad of potential liabilities they may face. Contents include: the nature and legality of D&O liability insurance sources of directors' and officers' liability liability to third parties liability at civil law persons covered by D&O insurance D&O exclusions defense costs cover and allocation aggregation principles and D&O cover reinsurance of D&O policies.