This collection originally published: Nashville : T. Nelson, 1974 ; London : Millington, 1975.
Contents: Threads of time / by Gregory Benford - The Marathon photograph / by Clifford D. Simak - Riding the torch / by Norman Spinrad.
Threads of time : three original novellas of science fiction. ISBN 0006146147. Published by Fontana in 1977. Publication and catalogue information, links to buy online and reader comments.