Ernst Cassirer was professor in Göteborg from 1935 to 1941. This episode of his life is little known, even though the Swedish years were very important. During that time of political turmoil he wrote several books and most of the papers that are now being published posthumously. This book - based on recently discovered sources - gives a detailed picture of Cassirer’s life and work in Sweden. It explains how he was invited to Sweden and why he became a Swedish citizen. The analyses show how Cassirer’s exchange with Swedish philosophers influenced his work and shed new light on his development during exile. This study also contains an introduction by John Michael Krois, a chronology of the Swedish years and a description of the long lost manuscript of Das Erkenntnisproblem, volume four.