Living in Threes — Judith Tarr

Three lives. Three worlds. Three times. Three young women, past, present, and future, come together to solve an age-old mystery and save a world. Meredith is just settling in for a long and lazy summer, when her mother announces that she's sending Meredith to Egypt to dig up an ancient temple. That's her mother's dream vacation, not hers. But there are greater forces at work than a sixteenth-birthday present she doesn't want and a summer she didn't plan. Meru lives on a far-future Earth, where disease has been eliminated and humans travel through the stars in living ships. Just as Meru is about to fulfill her dream of becoming a starpilot, a mysterious message sends her on a journey to find her missing mother and save the people of Earth from a deadly plague. Meritre is a singer in the Temple of Amon in ancient Egypt. Her people have survived a devastating plague, but Meritre foresees that the sickness will return. As she struggles to find a magical spell that will keep her loved ones safe, the gods take one last life. That life, and that death, will resonate through Meredith and Meru to the end of time.