Nanosecond by Peter Anthony Flynn
Approx. 20,430 words.
Published on March 17, 2011.
Wrongfully-convicted for the murder of his wife, a man and his captor - an AI who's timenapped him a nanosecond before lethal injection to an artificial planet a thousand light years from Earth for a diabolical purpose - befriend each other and embark on a secret mission back to Earth to find the real killer.