The Memory of Bones (The Secret is Out) - Alex Connor

The head of Francisco Goya was stolen from his tomb in the wake of his death. No one has ever known what happened to it. Until now. Leon Golding has always been ignored by the art world he loves, but he's finally going to make his name as the man who found the skull of Goya. But he's asked the wrong people to help him prove he's right. Now everyone wants to own the most prized piece of art history ever to come to light. And they're ready to kill for it.