The Kuzari: Arguments in Defense of Judaism

This is a classic of Jewish philosophy for a reason. Jewish responses to proselytizing from Christians and Muslims and a comprehensive introduction to the philosophy of HaLevi from mystical to mundane and all presented as a series of dialogues featuring the Khazar khagan who prompted the conversion of the upper class of his empire to Judaism. HaLevi takes a fascinating historical event in Jewish history and turns it into a masterpiece of Jewish philosophy.