The book was Catham's Revised History of Toromon. He opened the sharkskin cover and flipped a few pages into the text.
"... from a few libraries that survived the Great Fire (from which we will date all subsequent events). Civilization was reduced beyond barbarism. But eventually the few survivors on the Island of Toron established a settlement, a village, a city. Now they pushed to the mainland, and the shore became the central source of food for the island's population which now devoted itself to manufacturing. On the coast, farms and fishing villages flourished. On the island, science and industry became sudden factors in the life of Toromon, now an empire.
"Beyond the plains at the coast, explorers discovered the forest people who lived in the strip of jungle that held in its crescent the stretch of mainland. They were a mutant breed, gigantic in physical stature, peaceful in nature. They quickly became part of Toromon's empire, with no resistance.
"Beyond the jungle were the gutted fields of lava and dead earth, and it was here that the strange metal tetron was discovered. A great empire has a great crime rate, and our penal system was used to supply miners for the tetron. Now technology leaped ahead, and we developed many uses for the power that could be released from the tetron.
"Then, beyond the lava fields, we discovered what it was that had enlarged the bodies of the forest people, what it was that had killed all green things beyond the jungle. Lingering from the days of the Great Fire, a wide strip of radioactive land still burned all around the lava fields, cutting us off from further expansion.
"Going toward that field of death, the plants became gnarled, distorted caricatures of themselves. Then only rock. Death was long if a man ventured in and came back. First immense thirst; then the skin dries out; blindness, fever, madness, at last death; this is what awaited the transgressor.
"It was at the brink of the radiation barrier, in defiance of death, that Telphar was established. It was far enough away to be safe, yet near enough to see the purple glow at the horizon over the broken hills. At the same time, experiments were being conducted with elementary matter transmission, and as a token to this new direction of science, the transit ribbon was commissioned to link the two cities. It was more a gesture of the solidarity of Toromon's empire than a practical appliance. Only three or four hundred pounds of matter could be sent at once, or two or three people. The transportation was instantaneous, and portended a future of great exploration to any part of the world, with theoretical travel to the stars.
"Then, at seven thirty-two on an autumn evening, sixty years ago, a sudden increase in the pale light was observed in the radiation-saturated west by the citizens of Telphar. Seven hours later the entire sky above Telphar was flickering with streaks of pale blue and yellow. Evacuation had begun already. But in three days, Telphar was dead. The sudden rise in radiation has been attributed to many things in theory, but as yet, an irrefutable explanation is still wanted.
"The advance of the radiation stopped well before the tetron mines; however, Telphar was not lost to Toron for good, and ..."
Jon suddenly closed the book. "You see?" he said. "That's why I was afraid when I saw where I was. That's why ..." He stopped, shrugged. "You're not listening," he said, and put the book back on the shelf.