Discussing illegal drugs without taking into account its criminal context is a difficult proposition. Certain questions come back repeatedly: Does doing drugs really lead to delinquency? Do some drugs have criminal properties? Why would a drug addict turn to crime? What are the best methods of intervention in dealing with individuals who have serious drug habits? The third edition of Drogue et criminalité : Une relation complexe (Les Presses de l'Université de Montréal), tran