Michelle Tancredi Secrets of the Unknown: The Titanic Secrets of the Unknown: Big Foot Secrets of the Unknown: Poltergeists Secrets of the Unknown: Jack the Ripper Secrets of the Unknown: Nostradamus Secrets of the Unknown: Pearl Harbor Secrets of the Unknown: Life After Death Secrets of the Unknown: Dreams and Nightmares Secrets of the Unknown: Tornadoes Secrets of the Unknown: Lake Monsters