The Fires of Paratime

The Fires of Paratime PBKFrom the paperback:
HE WAS A PRODIGY AMONG THE POWERFUL

He was Loki -- grandson of the great time-diver Ragnorak -- destined for honors in the Temporal Guard on the planet Query. He could time-dive and planet-slide better than his senior officers. He could dip through the undertime with his bare hands. He was entrusted by the Tribunes of the Guard with Query's most precarious missions.

Until his powers earned him an ambitious enemy, and the enemy earned him the Guard's most brutal condemnation -- a sentence to Hell.

But Loki was on his way to becoming a god, and not even a term in Hell was going to stop him.

The Fires of Paratime BCE [Note the misspelling of his name!]

From the bookclub edition:
On the planes Query, immortality is universal and the ability to time-dive -- to swim through the currents of time and history -- is common. Those whose talents are developed enough join the Temporal Guard. Formed millennia ago, after the devastating war with the malevolent time-traveling Frost Giants, the elite Guard serves Query as protectors and suppliers, roaming the cosmos and time continuum to deal with races that might threaten Query and to bring back from technologically advanced civilizations the equipment they need, for Query has lost all ability to create its own technology. In actuality, the Guard acts, as well, as the rulers of the planet, and their rule has stood unchallenged for thousands of years....

....Until Loki comes along. Even among the Guards, Loki is something special. The grandson of the great Ragnorak, Loki demonstrated extraordinary time-diving abilities even as a child. Now, as an adult and a member of the Guard, his powers are still growing. He can penetrate the past deeper than the legendary Odinthor; he can outperform his senior officers in speed and accuracy; he can dip millions of years through the undertime and kill an enemy with his bare hands. When there is a problem that other guards cannot handle, they call on Loki. He has become almost a legend himself as a rescuer of lost time-divers and as the hero who single-handedly destroyed the sinister shark people. Mostly, Loki would prefer to be left alone in the unglamorous Maintenance section, where he studies the secrets of technology in the hope that someday Query might once again be free of the need to steal from other cultures.

But great men powerful enemies, and Loki's is the influential and unscrupulous Heimdall. Hating the undisciplined and independent-minded young time-diver, Heimdall will stop at nothing to rid the Guard of Loki.... Drawn unwillingly into the web of intrigue woven by Heimdall, Loki is forced to recognize the corruption and evil of a Temporal Guard that destroys entire civilizations with its time-manipulation and must steal from others in order to exist. He knows he must act -- an act that will require nothing less than becoming a god....