This book from Oxford University Press, is a scientific treatise on the subject. It has 256 pages and tables, graphs, 7 maps, notes, a bibliography of 20 pages and a detailed index. It should not be combined with the book titled "The Easter Island Enigma", a more popular book with 40 pages. The latter was translated into several languages including German with the title of "Die schweigenden Riesen der Osterinsel".