Marion Cave Rosselli is remembered as the `perfect companion' of the Italian Antifascist leader Carlo Rosselli, assassinated in Paris in June 1937. But little is known about the young English student fired with revolutionary enthusiasm who moved to Florence in 1919, witnessed the violent march of fascism to power and thereafter became a resolute adversary of the Mussolini dictatorship. Based on a wealth of little-used private and public archives, this biography retraces her journey from a modest home on the outskirts of London to the first underground Antifascist opposition in Italy, from the...