Sleeping in the Ground by Peter Robinson

When a sniper takes aim at a wedding, Detective Superintendent Banks and his colleagues wonder about who the targets are and about a possible motive. The clues are few and no one got a good look at the gunman. To try and unmask the killer, the police delve into the lives and pasts of the wedding party and their guests. In this latest book in the long-running series, Robinson puts together an interesting puzzle, and catching up with Banks and his colleagues is always a treat.