Very skillfully constructed.

Sophie is a mystery writer (like Jewell) who reluctantly moves to the country because her husband took a new job.

She finds a sign nailed to a nearby fence with an arrow and the words “Dig Here”.

She does. And it begins to unravel the mystery of a young couple that disappeared a year earlier.

Flashbacks take us back.

I would say the book could have been shorter. Jewell would be better with a more ruthless editor.

Still. Recommended.