Death in a high latitude

Dr. Braunschweig deputy chairman of Universal Oil, one of the world's largest oil companies, has been kidnapped in Hamburg. The bizarre ransom demanded is a 17th century map of the Artic which has recently disappeared from a Cambridge museum. Colonel Blair, liaison man between the Home Office and Scotland Yard, is called in and his investigations take him deep into the politics and geography of oil. With the help of Germany's Special Branch he pursues raunschweig's stolen yacht into dangerous Artic waters to an exciting climax.