More than thirty years ago, David Loftus's cherished identical twin, John, passed away. Ever since, a day hasn't passed without David feeling the loss. In 1987, after recovering from a brain tumour, John contracted meningitis and found himself back in hospital for treatment. David, as always, was by his side. They were opening their twenty-fourth birthday presents when a fatally miscalculated routine injection forced John into a coma. He died within...