The Paratime series deal with an advanced civilization that is able to travel between parallel universes with alternate histories, and uses that ability to trade for goods and services that their own, exhausted Earth cannot provide. Specifically, the Paratime series deals with the Paratime Police, the organization that protects the secret of paratime travel.
Table of Contents:
He Walked Around the Horses
Police Operation
Last Enemy
Temple Trouble
Genesis
Time Crime
Lord Kalvan of Otherwhen
Down Styphon!