Self-portrait with an unknown man, Caledonian Market, London c. 1930 by Edith Tudor-Hart | Courtesy of the copyright holders, Peter Suschitzky, Julia Donat, and Misha Donat. A major new biography explores the life of Edith Tudor Hart, a pioneer photographer in 1930s London who became a Soviet secret agent and had a hand in the history of the notorious “Cambridge Five.” The life of Edith Tudor-Hart — professional photographer, anti-fascist activist, and covert Soviet agent — has long evaded biographers. In A Woman Named Edith: Émigré, Photographer and Secret Agent — The Extraordinary Life of Edith Tudor Hart (published by Yale University Press London), Daria Santini, an independent scholar and writer, provides the first full biography of this elusive figure. Edith and Tommy Tudor Hart, London 1936 | Courtesy of the copyright holders, Peter Suschitzky, Julia Donat and Misha Donat. Edith Tudor-Hart was among the most important documentary photographers working in Britain in the 1930s and 1940s.…