Again following established practice, as in the case of The Lunar Trilogy, each volume was published in journal installments between 1912 and 1913 and then in book form in 1913 and 1914, on the eve of World War I.
Similar to how The Lunar Trilogy was distributed, each volume of the series was initially published in journal form from 1912 to 1913, followed by a full-length book release in 1913 and 1914, just before World War I.