The heretic, of course, is Tito, whom the author, as head of the British mission to the Partisans, knew during the war. Readers of Brigadier Maclean's earlier book, "Escape to Adventure," will find here the same qualities of mind and style. As a biography the book gains from the author's numerous personal contacts with Tito, during and after the war. He is certainly fair to his subject, perhaps unduly so. There is little reason, however, for doubting the conclusion that Tito's "fame will be celebrated by future generations of South Slavs, the fame of his virtues and of his vices alike."