Alien Offensive - Book 5 - Ultimate Sacrifice. Alien Offensive, #5

Thirty years ago, a distant alien race, whose home planet was in danger because of their failing red dwarf star, tried to invade Earth and kill off all life using mind controlling, nanobots. Thanks to the unusual talents of Dorothy Keets, an inspired physicist, the world was spared from the almost unstoppable alien weapon, but the aliens were nothing if not persistent. Ten years following the first attack, they tried again, this time coming to Earth while ensconced in their nearly indestructible vessels, and using several alien techniques and different weapons - they nearly succeeded.
The world's armies, after failing to so much as slow the second attack, called upon the same brilliant, slightly older, scientist, who helped stop the first attack, and she, while devising a unique, devastating, weapon, was not only able to stop the attack, but able to send the aliens scurrying back to their home world in utter defeat. Behind her second victory, she was recognized as a worldwide hero, but her weapon "The Orb Weapon" was so unique - so overpowering - so maniacal, and possibly world ending, the President of the United States ordered it deactivated, and secured inside a vault deep inside the bowls of Area 51 where it would remain to never be used again - at least, that was the plan.
Meanwhile, Dorothy Keets, the inspired physicist, along with the assistance of a Doctor Kim, the director of Area 51, who together, successfully, designed the second world saving weapon, were beginning their second victory celebration - but it would be a short lived festivity. The aliens now repelled for the second time, were already making plans to return - and they did while bringing with them new weapons, but their attack, again, was thwarted.
Dorothy's unconventional fearful weapon was un-crated, dusted off, and with a few modifications and enhancements, implemented to save the world once more while accidentally leaving behind one of their own. Dorothy was able to gain access to and establish a line of communication with the extremely intelligent alien, and gave it a name, George. While sensing Dorothy's compassion, George became friends with her, and taught her the secret of deep space travel.
He taught her how to construct stable wormholes, while unintentionally giving humankind the ability to strike back at his home world and the still antagonistic, aggressive, alien species. Norman Wells, the then President of the United States, while using the newly learned wormhole technology, sent a flotilla of orb weapon armed space fighters to the offending alien's planet and totally destroyed it.
President Wells, being a visionary, wasn't content with the victory over the aliens - he had grand plans for the use of the newly learned alien technology. He proposed a plan to build a massive deep space exploration vessel, later dubbed, Messenger Two. With the building of Messenger Two, humankind's dreams of becoming galactic explorers were finally realized. Now having the ability to go anywhere they wished, it was decided to find another planet in the galaxy suitable for human colonization, and enlisting the aid of George, that planet was discovered, and named Novus.
Unfortunately, the much anticipated colonization of Novus failed. Eventually, while realizing none of the problems on Novus could be easily solved, an evacuation of Novus was called for until a scientific team could be sent back to do a feasibility study. However, Dorothy felt that finding a way to live with the extremely virulent virus could not be found, but one scientist felt he could, which resulted in the near extinction of the entire human species .