Ariel: The Book of Fantasy
Encyclopedia
Ariel: The Book of Fantasy was a periodical book published by Peacock Press in the 1970s; among the more famous stories published by this elaborately produced and illustrated (and, for the time, expensive) series was Larry Niven
Larry Niven
Laurence van Cott Niven / ˈlæri ˈnɪvən/ is an American science fiction author. His best-known work is Ringworld , which received Hugo, Locus, Ditmar, and Nebula awards. His work is primarily hard science fiction, using big science concepts and theoretical physics...
's "Source of Power."