Aku-aku-the Secret of Easter Island [hardcover] Heyerdahl, Thor

'I HAD NO aku-aku. Nor did I know what an aku-aku was, so I could hardly have used one if I had it./ Every sensible person on Easter Island has an aku-aku. I too got one there, but at the moment I was organizing a voyage to that very place, so I did not posses one. Perhaps that as why arranging the journey was so difficult. Getting home again was much easier". From 1st paragraph. Illustrated with color photos and maps. 1958.