Into the Light by Jane Wallace

REVENGE CAN CROSS GALAXIES Tem Sevin, a special operations agent working for Coalition Space Command, has vowed to hunt down the enemy officer who killed his family. But, when his own side surrenders to the sinister rulers of the Gharst, he is left to continue the fight alone. Now a renegade, he agrees to execute a dangerous mission for the fledgling Resistance: to travel to Gaia, the distant motherworld,, and rally reinforcements for a final, decisive battle. The journey is perilous and his enemies manifold. In a thrilling race against time, Sevin must escape a ruthless corporation and a rogue geneticist, as well as the ever present Gharst who are determined to bring him to justice. However, the greatest test is yet to come. When Sevin finally meets his nemesis, he must make a choice: will he satisfy his revenge or save his crew and the woman he loves?