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Karl Schroeder: Lockstep (2014) 4 stars

"When seventeen-year-old Toby McGonigal finds himself lost in space, separated from his family, he expects …

Review of 'Lockstep' on 'Goodreads'

4 stars

I found the "lockstep" concept of worlds hibernating for years interspersed with weeks of activity fascinating and original, and the family history driving the story is interesting as well.