True adventure in detailed examination of such mysteries as the disappearance of the Greenland Colony, the lost Franklin expedition, the death of Andree, the problem of Meighen Island, the missing Soviet fliers. He makes many interesting points as to possible causes, he discusses the contributions resulting from search parties, he presents cases for and against, and his solutions sound plausible. A book for all Arctic exploration fans, who enjoy very detailed and meticulous study of material.