The sixteen trees of the Somme

The death of Edvard's parents when he was three has always been a mystery but he knows that the fate of his grandfather's brother, Einar, is somehow connected. One day a coffin is delivered to the farm for his grandfather, long before the grandfather's death--a meticulous, beautiful, and unique piece of craftsmanship with the hallmarks of a certain master craftsman--raising the thought that Einar isn't dead after all. Edvard is now driven to unravel the mystery of his parents' death. Following a trail of clues from Norway to the Shetland Islands to the battlefields of France and sixteen ancient walnut trees colored by poison gas in World War I, Edvard ultimately discovers a very unusual inheritance.