Egypt under Macedonian rule following Alexander the Great's conquest in 332 BC, governed first by the nomarch Cleomenes of Naucratis and then, after Alexander's death (323 BC), by the satrap Ptolemy (son of Lagus) nominally in the name of the joint Argead kings Philip III and Alexander IV.
Ended in 305/304 BC when Ptolemy, having secured de facto independent control of Egypt, took the title of king (basileus), founding the Ptolemaic Kingdom.
The first full-length English biography of Ptolemy I, tracing his career as satrap of Egypt from 323 BC through his assumption of the crown in 305/4 BC — the exact span of this record.
The standard single-volume Hellenistic history, opening with Alexander's conquest of Egypt and the satrapal interregnum before the Successor kingdoms crystallized.