In The Origins of the Canon of the Hebrew Bible: An Analysis of Josephus and 4 Ezra, Juan Carlos Ossandón Widow examines the thorny question of when, how, and why the collection of twenty-four books that today is known as the Hebrew Bible was formed. He carefully studies the two earliest testimonies in this regard—Josephus’ Against Apion and 4 Ezra—and proposes that, along with the tendency to idealize the past, which leads to consider that divine revelation to Israel has ceased, an important reason to specify a collection of Scriptures at the end of the first century CE consisted in the need to defend the received tradition to counter those that accepted more books.