Can anyone give me a brief summary of Long Road to Mercy by David Baldacci? PLEASE

Basically why the story starts: Having grown up in Andersonville, Georgia, FBI Agent Atlee Pine’s childhood was defined by one horrific moment when her twin sister, Mercy, was kidnapped in the summer of 1989. She was never located, dead or alive, and her whereabouts remain a mystery to this day, prompting Atlee — who wrestles with survivor’s guilt — to go searching for answers.

shean is his name and he has been a shepord for   14 years

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