Sisti's superb book breaks new ground both in the study of Ramsey and in the theory of conditionals. Anyone working on these important topics needs to read Frank Ramsey's Theory of Conditionals. Cheryl Misak, University Professor and Professor of Philosophy, University of Toronto This book provides a fully developed account of Frank Ramsey's theory of conditionals. No proper study of Ramsey's view of conditionals has been carried out so far. This work aims at filling this gap. The book is divided in two parts and in four chapters. The first part of the book is historical, investigating Ramsey's texts and recovering his view on conditionals. The second part is systematic, updating and developing a unified account of conditionals following Ramsey's ideas Caterina Sisti is a Postdoctoral Researcher at the Scuola Normale Superiore.