The Insurance Distribution Directive (IDD) constitutes a piece of the European Union’s primary legislation. This book analyses the impact that the IDD has on insurance distributors, that is, insurance intermediaries and insurance undertakings, as well as the market. The main changes introduced by the IDD are examined and thoroughly discussed. This is the first book approaching in a detailed manner the analysis and interpretation of the IDD. It forms a comprehensive legal and regulatory analysis of the changes introduced by the IDD and draws on interrelations between the rules of the Directive and other disciplines that are relevant to the distribution of insurance products. This book discusses various topics related to the interpretation of the IDD in relation to (a) the harmonization achieved under it, (b) the role of the IDD as a benchmark for national legislators, (c) the interplay of the IDD with other regulations and sciences and (d) an empirical analysis of the standardized pre-contractual information document.