Dwellers in the Mirage — A. Merritt

American Leif Langdon who discovers an amazing warm valley in Alaska! Two races inhabit the valley, the Little People and a branch of an ancient Mongolian race and they worship the Kraken named Khalk'ru which they summon from another dimension to offer human sacrifice. The inhabitants believe Langdon to be the reincarnation of their long dead hero, Dwayanu...