Helia's Shadow Part One — K.C. Neal

Sixteen-year-old Helia wants two things in life: to step out of her over-protective mother's shadow and become an engineer, and to stop hiding her relationship with alien boy Kalo. But the world definitely isn't ready for a human-alien romance. And worse, the human-alien partnership is crumbling. Humans are arrested without explanation. Some of them are never seen again. When the alien leader imprisons her mother on a false charge, Helia discovers the aliens never intended to help humans at all. Now, she must join forces with alien rebels. If she succeeds, humans have a chance at survival and she has a chance at love. If she fails, the dwindling human race dies out in slavery. When the aliens arrived, they were hailed as the saviors of a dying Earth and dwindling human race. But the aliens didn't come to help. Now, one human girl's ingenious invention and one alien boy's awakened heart are humanity's last hope...