The Eternal Lover is a fantasy-adventure novel by American writer Edgar Rice Burroughs. The story was begun in November 1913 under the working title Nu of the Niocene. It was first run serially in two parts by All-Story Weekly. The first part, released March 7, 1914 was titled "The Eternal Lover" and the second part, released in four installments from January 23, 1915 to February 13, 1915 was titled "Sweetheart Primeval". The book version was first published by A. C. McClurg on October 3, 1925. In 1963, Ace Paperback published a version under the title The Eternal Savage. An E-Text edition has been published by Edgar Rice Burroughs, Inc. and is available online. Source: Wikipedia (en)