1976 1st year edition; Morrow and Company publishers, New York; hardbound in mustard boards with black lettering along spine; Book Club Edition; very good condition with unmarked pages; dust jacket very good.
 
Description -
Gunnar Thorkild, grandson of the last great Polynesian navigator, has rashly proclaimed, in a scientific paper, the existence of a legendary island to which all navigators go on the eve of their death. With his future at the Hawaii Institute on the line, he embarks on an epic voyage of discovery.
 
goodreads review -
The story of one man's search for an uncharted, legendary island to which all navigators are said to go on the eve of their deaths. A tale of high adventure, ancient mystery and modern men and women rediscovering love, comradeship and tribal life, in the face of primal terrors.