In his book Magnus Nordenman sets out to explore the emerging competition between the United States and its allies in NATO and the resurgent Russian navy in the North Atlantic. The North Atlantic played a key role in the two world wars and the Cold War as the strategic link between the United States and Europe that allowed reinforcements and supplies to flow to embattled allies. Nordenman shows that while a conflict in Europe has never been won in the North Atlantic it surely has been lost there. However the North Atlantic fell away from attention as the Cold War ended the Russian navy fell into decay and the United States and its allies turned to counter-terrorism and expeditionary operations in the far corners of the earth.With Vladimir Putin's Russia threatening the peace in Europe since the annexation of Crimea in 2014 the North Atlantic and other maritime domains around Europe are once again coming into focus. But this battle will be different Nordenman shows due to an overstretched US Navy disruptive technologies a NATO that woke up to the Russian challenge while essentially unprepared for high-end warfighting in the maritime domain and a Russia that commands a far smaller but more sophisticated navy equipped with long-range cruise missiles that have already been used in operations in Syria. Nordenman concludes that the new contest in the North Atlantic will not be about keeping the sea lanes open or facing down a Russian anti-shipping campaign in the vast expanses of the ocean. Instead the Russian threat comes from submarines operating in the far North Atlantic where they can strike at targets across Europe using long-range cruise missiles.Nordenman's book describes the evolution of warfare in the North Atlantic in the 20th century and points to the enduring strategic factors and dynamics in that maritime domain that must be kept in mind as the United States and NATO devises new strategies for defense and deterrence in the North Atlantic. He also highlights how the strategic and operational environment has changed since the end of the Cold War with the coming of new technologies new players in the North Atlantic and the new Russian way of war in the maritime domain. He concludes with a set of recommendations for the United States and its NATO allies on how to build an effective approach to ensuring that the North Atlantic remains an open bridge between North America and Europe in both peace and war.