The Year of the Quiet Sun (1984)

Description[from Freebase]

The Year of the Quiet Sun is a 1970 science fiction novel by Wilson Tucker about the use of forward time travel to ascertain future political and social events. It won a retrospective John W. Campbell Memorial Award in 1976. It was also nominated for a Nebula Award for Best Novel in 1970, and a Hugo Award for Best Novel in 1971. During a vacation on a Florida beach in the summer of 1978, Brian Chaney, a demographer and biblical scholar, is approached by a woman named Kathryn van Hise. Initially assuming her to be a reporter interested in a controversial book he just published on the Dead Sea scrolls, she informs him that she works for the federal Bureau of Standards and that she is recruiting him for a physical survey of the future via a secretly constructed "TDV" or time displacement vehicle. When Chaney demurs, she informs him that his contract with has been purchased from the think tank where he works, leaving him little choice. The reluctant Chaney travels by armored train to a military installation south of Joliet, Illinois.

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