The 1950s in America are typically summed up in pictures of perfect middle-class families, happily conformist patriotism and a rabid anti-communism. Mostly though, they are seen as having served to cultivate an idealism that would erupt in outraged discontent in the 1960s. The Life and Times of the Thunderbolt Kid by Bill Bryson(Doubleday, Rs 870) is about his memoir of growing up in that not-so-turbulent decade. For Bryson, the &lsquo50s were about promise &mdash that flying cars were just around that corner and that it wouldn&rsquot be long before everyone was taking vacations on Mars.