Fort expands in this book on his theory about the Super-Sargasso Sea - a place where earthly things supposedly materialize in order to rain down on Earth - as well as developing an idea that there are continents above the skies of Earth. As evidence, he cites a number of anomalous phenomena, including strange "mirages" of land masses, groups of people, and animals in the skies. He also continues his attacks on scientific dogma, citing a number of mysterious stars and planets that scientists failed to account for.
Of all of Fort's books, New Lands is the worst-regarded. His speculations (serious or joking, he does not reveal) concerning continents in the sky and the supposed top-like shape of the Earth have dated considerably.