The Impossible Lives of Greta Wells

As each of her three 'selves' receive the shock, they move round robin to the other times and other lives of Greta. The Greta from each time wants a slightly different outcome, a resolution to their own current situation. What or how will each Greta affect the lives of the alter egos who actually belong to that era, while they try to affect their own desired outcome?
Despite the three Gretas, the story's telling focuses mainly on one, and even in so doing, manages to tell the triune story. Well-written, fascinatingly interwoven and engaging.