"Conversation Pieces: A Survey of the Informed Group Portrait in Europe and America" is a 1971 hardcover book written by Mario Praz in English. Published by Egmont UK LTD, the book delves into the concept of the informed group portrait in Europe and America. With 240 pages, the book explores various themes and ideas related to group portraiture in a conversational style, making it a valuable addition to any art or culture enthusiast's collection. Its dimensions of 280mm in height and 250mm in width make it a substantial and visually appealing piece for display and reference.