From Wikipedia:
The Saga of Cuckoo is a series of science fiction novels by American writers Frederik Pohl and Jack Williamson. It consists of two novels, Farthest Star and Wall Around a Star.
The books feature an interstellar teleporter that leaves the original being behind and sends only a duplicate. When a person is duplicated, the original can just pass out of the machine without a second thought. The copies also can be “edited” at destination.
Farthest Star was published by Ballantine Books in 1975, as a fix-up of the 1973 novella “Doomship” and the 1974 serial “The Org’s Egg”.
Author’s names are set in Limited (see Corporate). The novel’s title is set in Limited View (see Corporate Image). The minor differences between Corporate and its copy, Limited, are documented here. Additional text is set in Trade Gothic Extended.
Cover art by Philip Perlman.
[More info on ISFDB]