Lacan's 'L'Etourdit' is a pivotal yet still underappreciated piece of his corpus. In Badiou and Cassin's concise tour de force, two of France's most important living minds tackle this enigmatic text. Through their combined efforts, Badiou and Cassin render 'L'Etourdit' crystal clear, situating Lacan's later teachings in relation to the history of philosophy and logic starting in ancient Greece. This three-way encounter between Lacan, Badiou, and Cassin, stimulating and surprising to equal degrees, will be enthralling for anyone interested in what philosophy and psychoanalysis have to say to each other. -- Adrian Johnston, University of New Mexico at Albuquerque This is a fascinating and complex little book. Specialists will no doubt spend hours and hours debating the significance of these two lectures for the understanding not only of Lacan but also of the respective projects of his two readers, Badiou and Cassin. -- Bruno Bosteels, Cornell University