At the end of 1944, following the coup against the country's pro-Axis dictator, Boz returned to Romania, where he co-founded the French-language daily "L'Information Internationale". He was a columnist at "Democrația", the independent left-wing weekly, and had poetry published in the Communist Youth journal, "Scînteia Tineretului", while also working as an editor at "Finanțe și Industrie" daily and a correspondent of the Romanian Press Information Agency (ARIP). In 1945, he published a book on wartime France, "Franța, 1938—1944", described at the time by Petru Comarnescu as one of "the books that so richly provide us with full awareness about the civilizations that will shape tomorrow's world." It is equal parts memoir, historical account, and a reportage with colorful detail. The first part deals with the Paris of 1938-1940, up through the Battle of France and the beginnings of the Resistance. In the second part, which begins with Operation "Torch", he describes his arrest, with a chapter on his wife's detainment written by her. He supplies descriptions of French people on both sides of the conflict and ends with the Liberation of 1944. It earned praise from the literary chronicler at "Revista Fundațiilor Regale", who noted its "adherence to the French spirit" and its "vivid and suggestive" depictions of "Maquis figures". Boz also translated Jean Bruller's "Le Silence de la mer", in his introduction discussing the choice between resistance and collaboration faced by wartime French writers.