The Fugue swept human-occupied space, wiping all knowledge from the minds of men and leaving them helpless in a new Dark Age. The long climb back to intelligence takes eight hundred years. Yet all memories of their parent civilization are lost. The Church rules the stars...and controls all artifacts of the forgotten time. When respected archeologist Waverly Brennan uncovers evidence that the Church's gods are no more than men of the old age, he is warned to silence. To speak would mean galaxy wide upheaval...
Used availability for Edward A Byers's The Long Forgetting
August 1985 : USA Paperback