President Trump's assertions on Greenland reveal a regional context where fast-moving climate change is opening up new trade routes, untapped natural resources and long-frozen biological weapons.

Award-winning commentator Kenneth R. Rosen draws on first-hand reportage and testimony to document the race to control this strategically crucial territory. Can America, which since the 1990s has lagged behind on infrastructure, really reimpose its might against the superior technology and strategic engagement of Russia and China? Above the Arctic Circle, the world's superpowers stand on the brink of a new cold war - and every day it grows hotter.

Timely and incisive, Polar War is an essential account of the interests, landscapes and people at the world's most extreme frontier. 'This reporting is indispensable' FINANCIAL TIMES'A wake-up call to the West' JONATHAN BEALE, BBC Defence Correspondent