More than two centuries ago, compelling evidence of buried treasure was found on Nova Scotia's Oak Island. Since then, extensive engineering works have been discovered and mysterious objects unearthed in and around the island's "Money Pit." The ongoing search has been featured on a long-running popular television series, but to this day, the island guards its secrets. In this book, historian John Bell presents all the competing theories — about who buried treasure on the island and how the complex structures in the Money Pit that have kept treasure hunters at bay were created.