The 13th Power War

Then came modern man, about 20, 000 years ago, and from that point on he destroyed his enemies without compassion, enslaved other races, and murdered for sport all manner of men and beasts. In this final installment of The 13th Power Trilogy, the peaceful Beltzans of the green planet, 100, 000 light years from earth, experience a close encounter of their own third kind. They believe a spacecraft belonging to the Tarreeda, a race of warmongers who had been banished from their planet 1000 generations ago, has entered orbit on a scouting mission.
Their return would mean war. However, Luthes Rez, helmsman of the Orbital Patrol Ship Questnar has his doubts. The Tarreeda cross is not displayed on the spacecraft's fuselage, but instead, strange symbols that mean nothing to him. Janis Mackey and his new bride, Tracy, have been invited to NASA for a special meeting with General Brigham and the unveiling of the greatest scientific expedition ever conceived of by man: a return trip to the 13th Power.
They've built a machine capable of transporting a fleet of heavily armed Aerospace Shuttles to the green planet. Brigham needs Janis's mathematical prowess to conquer the aliens and steal their technology, but Janis wants nothing to do with an intergalactic war. So Brigham has Tracy arrested for her part in the previous CIA/Star Wars conspiracy that brought down the President of the United States.
If Janis fails to cooperate, Tracy will be put to death for treason. Ray Crawford's secret has been discovered. Aliens! Now an alcoholic recluse, he refuses to take calls from NASA until news of alien prisoners being brought back to earth drags him out of the bottle. He sets out on a mission to save the aliens who had spared his life during their previous brief close encounter. Though love has never come easily to Lisa Crawford, she's finally found her man.
He's a quiet soul, peaceful, and a hero in his own right. But Luthes is a prisoner of war, and her father will never approve of her love for an alien. Meanwhile, in Ethiopia, Milton Spears, an archeologist on assignment from CU Boulder, discovers an alien truth buried on Choke Mountain that will uproot the foundation of mankind's origins on earth, a truth the US government's super-secret Aquarius Project wants protected, at all cost.
This is a story of mankind's treachery and the horrors of galactic war. You won't shed a tear for humanity. We don't deserve the sympathy.