It is 1987. Tom Linstrum's older brother is in charge of the extraordinary "time gate" that projects people backward and forward in time. This engrossing and ingenious science-fiction story presents all sorts of riddles in the midst of high-powered action, historical havoc, and scientific speculation.
Used availability for John Jakes's Time Gate
1972 : USA Hardback
Title: Time Gate
Author(s): John JAKES
ISBN: 0-664-32510-6 / 978-0-664-32510-7 (USA edition)
Publisher: The Westminster Press
January 1978 : USA Mass Market Paperback