Loren Robinson - Time Gap

In the distant future, AD 6582 Professor Kato Maun transcribes an ancient writing on an archaeology find that sets off a search for an unknown lost civilization somewhere in the ancient past. With the help of a beautiful, mysterious, intelligence agent known only as Lavina, Kato journeys back through time to the edge of the fire barrier, which is the beginning of their history. The lost civilization surely must lie beyond the fire barrier which Kato must break through to make the discovery. It's assumed that the lost civilization was destroyed by fire in AD 2020. In seeking the past Kato also discovers many truths about the future and the peril that lies there.