This book on the Yali, Mek and Ok cultures is the last one in our series covering the major Ethno-linguistic groups in the highlands of West New Guinea (WNG). Some members of one of these inhabitants of the interior of WNG, the Mek group, were the first to have had any contacts with the outside world. A journal article published in a Dutch in 1912 gives the first account to the world about the mountainous interior of New Guinea along with an overview of the lives of the area’s inhabitants. The Mek territory also made news in 1960 when a French expedition was the first to cross WNG from south to north, through the near-incredible rugged mountainous territory. The Mek were also the last Papuans to have attracted the sustained missionary attention. Then, a large German multi-disciplinary scientific team spent two years, 1974 to 1976, among the Mek, with a plethora of publications resulting from their work.