This review was first published by Booklist on January 1, 2020.
**STARRED REVIEW** After the fall of Earth, humans colonize other planets, some of which are at war while host to increasing numbers of refugees, with the destitute living in urban squalor while the rich flee to their mansions. Flying between worlds on relativistic space ships are Trader families, who experience months as years pass for the planet-bound. Hisako Sasaki, an unauthorized child on the planet Gaul, is contracted to marry the Trader Adem Sadiq before she’s even born. Hisako grows up knowing her future is out of her control, while the Sadiq’s discover an ancient lost ship with technology that could change everything. There are elements of a thriller story here, but this isn’t about plot. Instead, it’s a social and family drama with a focus on character study and world building. The novel is conceived around a set of questions: How would the time dilation of relativistic travel affect civilization? How would space travelers relate to the planet-bound? How would it alter our perceptions of history and our responsibilities to one another? Greene builds his immersive and socially complex world on these deeply human questions. The Light Years is a story of resistance and acceptance, anger and forgiveness, and the costs of our actions.