In the Shadow of the Moon — Scott G. Gier

HEART OF GENELLAN
Hotshot pilot Sharl Buccari was a living legend. She had led her crew of civilians and space marines to safety on the raw frontier planet Genellan. She had engineered peace with both alien races that claimed Genellan as their own. Now she faced building a colony, forging diplomatic relations among the three races, and raising her infant son alone.
But alien rebellion and xenophobia threatened to tear apart the fragile truce for which she had fought so hard and lost so much. Worse, the dread aliens who twenty-five years earlier had massacred entire star systems were back--and on the warpath.
The military needed Buccari like never before. The other survivors could take care of Genellan, and her alien friends could take care of her child. But only Buccari belonged to all three races of Genellan. Only Buccari could hope to unite them all against a common--and deadly--foe . . .