In 1988, after years of failed negotiations over the status of the Northwest Passage, Brian Mulroney gave Ronald Reagan a globe, pointed to the Arctic, and said “Ron that’s ours. We own it lock, stock, and icebergs.” A simple statement, it summed up a hundred years of official policy. Since the nineteenth century, Canadian governments have claimed ownership of the land and the icy passageways that make up the Arctic Archipelago. Unfortunately for Ottawa, many countries – including the United States – still do not recognize the Northwest Passage as internal Canadian waters. Crucial to understanding the complex nature of Canada’s Arctic sovereignty is an understanding of its history. In Lock, Stock, and Icebergs, Adam Lajeunesse draws on a wealth of recently declassified Canadian and American archival material to chart the origins and development of Canadian Arctic maritime policy – from the earliest police patrols in Hudson Bay to the deployment of nuclear submarines. Detailing decades of internal policy debates, secret negotiations with the United States, and long-classified joint-defence projects, he traces the circuitous history of Canada’s official claim to the Northwest Passage and the otber Arctic waters. Lock, Stock, and Icebergs shows how successive governments spent decades trying to figure out what exactly ownership of these waters entailed. It sets the stage for understanding the challenges Canada now faces as it navigates a rapidly changing Arctic, especially in terms of balancing the political requirements of sovereignty with concerns about the environmental and economic and social development. One thing is certain: in the years to come, strengthening Arctic sovereignty will become a more complex process than ever before.