Whirlwind

Whirlwind is a novel by James Clavell, first published in 1986. It forms part of The Asian Saga and is chronologically the last book in the series.
Set in Iran in early 1979, it follows the fortunes of a group of Struans helicopter pilots, Iranian officials and oil men and their families in the turmoil surrounding the fall of the Iranian monarchy and the rise of the Ayatollah Khomeini. Like many of Clavell's novels, it is very long and is composed of many interweaving plot strands involving a large cast of characters, as well as a detailed portrayal of Iranian culture.