Operation Napoleon — Arnaldur Indridason

1945 A GERMAN BOMBER CRASH-LANDS ON A GLACIER -- puzzlingly, there are both German and American officers on board. The senior German officer sets off, a briefcase handcuffed to his wrist, only to vanish into the whiteness.

TODAY. THE BOMBER, LONG MISSING, IS DISCOVERED ON THE GLACIER, and a team of American intelligence officers descends upon the wreckage. At the same time, a nearby rescue volunteer disappears. The volunteer's sister, Kristin, embarks on a dangerous search for him -- and stumbles upon an elaborate conspiracy. What did Kristin's brother see on the glacier, and how far will certain people go to stop her from finding him? She'll have to crack a top-secret wartime plan, code-named Operation Napoleon, if she ever wants to see him alive.