Echoes from the Dead by Johan Theorin

This is a first novel which became a bestseller in Sweden. Center to the story is a crime that happened twenty years ago. A young child disappeared. He may have drowned but no one knows for sure. His mother, Julia, has never recovered fully from the tragedy. She moved away from the Island but was never able to move on. Her relationship with her father has been strained for years. One day Julia's father calls to tell her he received a package in the mail - a sandal that was old and was made for a child. The description sounds like it fits the sandals that Jens was wearing the last time she saw him. So begins a trip back to the Island and a trip to the past. Eventually she finds out what happened - and so do we. Not a fast-paced book but it held my interest.