Complex sentence: Because of the fame of Mussolini and the author's familiarity with the dictator, the book had considerable success (17 prints) and was translated into 18 languages, including Japanese and Turkish.
Split into simpler sentences: Because of the fame of Mussolini and the author's familiarity with the dictator, the book had considerable success and 17 editions were printed. It was also translated into 18 languages, including Japanese and Turkish.