Despite the important place it occupies in both Freudian and Lacanian nosology, obsessional neurosis has received far less attention than its erstwhile companion hysteria. This book elaborates and deepen research into questions of obsession, going beyond the usual clichés which reduce obsession to the question "Am I alive or dead?". Emphasis is given to the structure of this neurosis, as distinguished from its symptomatology, and to clinical questions of work with obsessional subjects. The chapters provide discussions of some of the following themes: the creation of the category of obsessional neurosis and of obsessive-compulsive disorder (OCD), the fate of desire and the inability to act in obsession, debt and guilt, obsessional manoeuvres and their implications for the treatment.