Samantha Harvey’s novel “Orbital,” which won the Booker Prize last year, has a tight, poetic frame: We follow one day in the lives of six people working on a space station above Earth, orbiting the planet 16 times every 24 hours. But this is not a saga of adventure or exploration. It’s a quiet meditation on what it means to be human, prompted by a series of personal reckonings each character faces while floating 250 miles above home.

This week on the Book Review Book Club, MJ Franklin talks about “Orbital” with fellow Book Review editors Joumana Khatib and Jennifer Harlan.

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