The Smoky God
by Willis George Emerson
1908

This is another classic fictional hollow earth adventure. The narrator, Olaf Jansen, is a Norwegian who sails with his father deep into the northern ice. There they sail over the lip of the hollow earth, and into the inner world, lit by a dim central sun (the 'smoky god' of the title). The inhabitants are an advanced race of giants who have electricity, monorails, and extremely long lifespans. The travelers return to the surface through the Antarctic, and as is usual in this genre, lose everything which could confirm their tale on the return voyage.--J.B. Hare