This is science fiction book. He was walking endlessly down a long, glass-walled corridor. Bright sunlight slanted in through one wall, on the blue knapsack across his shoulders. Who he was, and what he was doing here, was clouded. The truth lurked in some corner of his consciousness, but it was not reached by surface awareness. The corridor opened at last into a large high-domed room, much like a railway station or an air terminal. He walked straight ahead. At the sight of him a man leaning negligently against a stone pillar, to his right but within vision, straightened and barked an order to him, 'Halt!' He lengthened his stride but gave no other sign. Two men hurried through a doorway of a small anteroom to his left, calling to him. He turned away and began to run. Shouts and the sound of charging feet came from behind him. He cut to the right, running toward the escalator to the second floor. Another pair of men were hurrying down, two steps at a stride. With no break in pace he veered into an opening beside the escalator.