Six Wakes

The setting of Mur Lafferty's science fiction thriller is a space ship carrying thousands of dormant passengers to a new planet decades distant from earth. It's the 25th century and humans have pretty much ruined the earth, so those who can afford to leave do. The crew—gofer Maria Arena, Capt. Katrina de la Cruz, navigator/pilot Akihiro Sato, security chief Wolfgang, engineer Paul Seurat, and ship's physician Dr. Joanna Glass— are all former criminals who have exchanged their sentences for ferrying this ship to a new world and a new start for themselves; they will be continually re-cloned in order to survive the journey. But as the story opens, the crew's clones awake to find their former selves have been murdered and their memories of not only their deaths, but of the last 20 years of their lives have been erased from the mindmaps that are routinely inserted into new clones to provide continuity. The ship's AI,  IAN, has taken them off course and offers mixed messages with regard to sorting out what happened. As the six crew members struggle to get control of the ship and find the murderer(s?), flashbacks reveal secrets about their past that have been kept hidden or suppressed through mind manipulation. These are complex characters and as they learn about one another, never knowing who to trust, the reader is also challenged to consider what makes us uniquely human. Great futuristic "locked room" mystery.
This book has been nominated for both the Philip K. Dick and the Nebula Awards in 2018. Reviews from NPR, Kirkus, Publishers Weekly, and Booklist.