Isaiah was one of the great prophets of the eight and seventh century BC. Jewish tradition has it that he was sawn in two under the reign of Manasseh. During the last more than two centuries his book often suffered the same fate, being torn into two, three or more pieces and divided amongst many hands. Nowadays Old Testament Scholars of different backgrounds see some kind of unity for the whole of the book. Here is a suggestion for an outline of the book as stemming from one author.