Political analysis that tends toward the banal: ""In Greece, as in other countries, people tire of having one party in power for a long time."" Restlessness, then, is as far as the Careys are able to go in understanding the swift shifts of power and revisions of the form of government that have beset modern Greek history. The Careys, who have previously written shorter pieces on the Mediterranean area, provide a survey of the merry-go-round of splintering parties, elected dictatorships, and republican monarchy of the last 140 years. The material is painlessly presented but there are shallow conclusions. Particularly in regard to the Papandreous, pere and fils so important in the last quarter century -- who get only pseudo-treatment. The elder Papandreou who guided the recovery of Greece from the war appears here as ""a firebrand leader of the noisy opposition,"" and his son, an important economist and still a political contender, is mentioned mainly for equivocating on Communism. The book does skitter over events up to the 1967 coup. But it leaves the Grecian political paradox undeciphered.