 It was first published in book form by A. C. McClurg & Co. in March 1917 and has been reprinted numerous times since by various publishers.In this novel, for the first and only time in the Tarzan series, the main character is not Tarzan himself but his son Jack, who becomes known as Korak, first introduced (as a baby) in the earlier novels "The Eternal Lover" (1914/15) and "The Beasts of Tarzan" (1914).Korak would return as a supporting character in the later novels "Tarzan the Terrible" (1921), "Tarzan and the Golden Lion" (1922/23) and "Tarzan and the Ant Men" (1924).