The book concerns the four-day cruise to the Aegean islands made by the "inner circle" of the International Congresses of Modern Architecture (CIAM) and their friends during the 4th congress in August 1933. Structured around that sequence of Moholy-Nagy's film Architects' Congress dealing with the cruise, the book sheds light on this legendary event in the history of the European architectural and artistic avant-garde. In addition the colourful and ironic six-page letter Moholy-Nagy wrote to his wife Sibyl describing the "motley crew" and the barely-seaworthy "yacht" that brought them close to the brink of disaster, allows exclusive insights.