MAR is a regulation aiming to establish integrity in the EU financial markets. Its essence concerns the prohibition of insider trading and market manipulation. Market participants have to comply, facing various prohibitions and obligations. Non-compliance can lead to sanctioning, including imprisonment of individuals. Awareness of these matters is crucial, especially for prevention and detection of abusive behaviours. This book provides an excellent overview in an easy consumable way so that the mastering of the legal text and its context is facilitated.