Song of the Soulless (Atlantis Legacy) by Lindsey Sparks

The fourth book in the exhilarating treasure-hunting adventure series, the Atlantis Legacy. Earth is doomed, but humanity still has a fighting chance... Cora, the reincarnation of the powerful Amazon warrior, Persephone, already died to protect Earth once before. She's not about to let her sacrifice be in vain. Backed up by a dream team of humans and Olympians, Cora races against the clock to save what she can of the planet-and people-she loves from the ruthless Tsakali invaders. As the clock ticks down, she fears she made a grave mistake. By refusing to abandon either of her people, she may have inadvertently doomed both. Read more