I would have read this book in the early to mid 90’s but I’m not sure if that’s when it was published. I remember that it was shelved with the Halloween books at my local library. An old man who has a white mustache is telling his grandson (may have been multiple grandchildren) about how his hair turned white. In his story he is pictured as a young boy but he still has the mustache, I remember thinking this was hilarious as a child. The gist of the story as far as I remember it is that when he was young he went into a haunted house or witch’s house on Halloween night and when he came out his hair had turned white. I have been wracking my brains for ages trying to remember the title of this book, I would love to read it again.