A fantastic techno-thriller—a classic of science fiction—tells of the events surrounding a realtor named Sarah Beaumont. She discovers strange recordings in an old mansion, containing names and events from American history. Trying to unravel this mystery, she encounters danger and realizes she has ended up at the center of a conspiracy. Sarah decides to post her research and facts online to draw attention to what’s happening. The novel raises important questions about the existence of human civilization and its vulnerability to interference in history.