Investigative reporter Ross Hunter nearly didn’t answer the phone call that would change his life – and possibly the world – for ever.‘I’d just like to assure you I’m not a nutcase, Mr Hunter. My name is Dr Harry F. Cook. I know this is going to sound strange, but I’ve recently been given absolute proof of God’s existence – and I’ve been advised there is a writer, a respected journalist called Ross Hunter, who could help me to get taken seriously.’What would it take to prove the existence of God