The Siege by Ben Macintyre is an interesting work of nonfiction book A Six-Day Hostage Crisis and the Daring Special-Forces Operation That Shocked the World.
Macintyre details the 1980 hostage crisis at the Iranian embassy in London, with twenty-six hostages taken. The perpetrators were Iranian Arabs from the Khuzestan region of Iran, where the Arabistan people were persecuted by the government in Iran, and the effort was bankrolled by Saddam Hussein, with he an enemy of Iran.This occurred six months into the hostage crisis at the U.S. embassy in Iran, and six days prior to the hostage-taking in London, eight U.S. soldiers were killed during an effort to rescue hostages. The Iranian government said the CIA was behind the London embassy attack, and that Iranians there would be happy to die as martyrs.
It's a fascinating account from Macintyre of the six-day event, which the attackers believed would be over a day, including the eventual raid on the embassy by British SAS forces acting on the go-ahead from Prime Minister Margaret Thatcher.