Most scholars believe the Book of Isaiah was written by several authors: the first 39 chapters by “Isaiah,” who lived before the Babylonian destruction of Jerusalem in 586 B.C.E.; chapters 40–55 by “Deutero-Isaiah,” who lived in Babylon toward the end of the period of Exile; and chapters 56–66 by “Trito-Isaiah,” who lived in the post-Exilic community in Palestine.