More Things in Heaven

First edition (1973)

More Things in Heaven is a science fiction novel written by John Brunner and based in part on an earlier work, The Astronauts Must Not Land copyrighted in 1963 by Ace Books, revised version published in 1973 by Dell Books. The title is taken from Shakespeare's Hamlet Act 1. Scene V.

Plot

A matter transmission machine seems to work properly when it sends things and people out. But when it brings them back, the astronauts have been changed unexpectedly. The machines might not be working properly. Or maybe they are working too well.