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“The Age of Miracles” is also unlikely to fully satisfy science-fiction buffs. Some in the book speculate that how humans have treated the Earth and its atmosphere may be the cause of the slowing. But the reason for the slowing is never fully explored and humans fail to find a solution to the problem. This is definitely not the main focus of Ms. Walker’s work as she chooses instead to describe the human side of the tragedy.

But it’s worth overlooking these flaws. On the whole, “The Age of Miracles” is a dark and beautiful book that follows the trials and tribulations of one child as she tries to survive middle school and family life — and also tracks society’s reaction to a bizarre natural disaster.

Jackie Stewart is a freelance writer in New York.