Ages in Chaos: A reconstruction of ancient history from the Exodus to King Akhnaton

Ages in Chaos is a book by the controversial writer Immanuel Velikovsky, first published by Doubleday in 1952, which put forward a major revision of the history of the Ancient Near East. Velikovsky had put forward his ideas briefly in Theses for the Reconstruction of Ancient History in 1945, but Ages in Chaos was his first full-length work on the subject.
A second volume was due for publication shortly after this but was postponed. Instead it was followed eight years later by Oedipus and Akhnaton. In the last two years of his life Velikovsky published a further two works on ancient history: Peoples of the Sea and Rameses II and His Time. At the time of his death he considered that completing his reconstruction of ancient history would require a further two volumes: The Assyrian Conquest and The Dark Age of Greece; these were never published in English, but the manuscripts have long been available online at the Velikovsky archive.
Velikovsky claimed in Ages in Chaos that the histories of Ancient Egypt and Ancient Israel are five centuries out of step. His starting point was that the Exodus took place not, as orthodoxy has it, at some point during the Egyptian New Kingdom, but at the fall of the Middle Kingdom. Velikovsky made heavy use in this and later works on ancient history of the concept of "ghost doubles": historical figures who were known by different names in two different sources (e.g. Egyptian and Greek) and were conventionally considered to be entirely different people living in different centuries, but who he proposed to be actually erroneously dated accounts of the same individuals and events.