All Things Undying — Marcia Talley

Hannah is stunned when a stranger stops her on the street to deliver a message from her long-dead mother. Susan Parker, Hannah learns, is a popular television medium whose accurate predictions leave fans and critics alike puzzled and intrigued. In spite of her scepticism, Hannah schedules a private reading. But on the morning they are to meet, Susan is struck by a hit-and-run driver. An accident? Hannah doesn't think so--especially when she discovers that more than one person had good reason to want Susan dead....