From the #1 bestselling French author and four-time winner of the Crime Writers’ Association’s International Dagger Award

"French crime queen's new mystery—her best yet."—The Sunday Times ("Must Reads")
 
A woman is found murdered in her bathtub, and the murder has been made to look like a suicide. But a strange symbol found at the crime scene leads the local police to call Commissaire Adamsberg and his team.
 
When the symbol is found near the body of a second disguised suicide, a pattern begins to emerge: both victims were part of a disastrous expedition to Iceland over ten years ago where a group of tourists found themselves trapped on a deserted island for two weeks, surrounded by a thick, impenetrable fog rumored to be summoned by an ancient local demon. Two of them didn’t make it back alive. But how are the deaths linked to the secretive Association for the Study of the Writings of Maximilien Robespierre? And what does the mysterious symbol signify?

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