OPUS: #056
 Title: Kaldar, World of Antares
 Author: Edmond Hamilton
 Year: 1933
 Type: novelette
 “A mighty story of a strange world far removed from Earth”–TOC
 “A stupendous novelette of a world far removed from Earth, of the Chan of Kaldar, and the spider-people from beyond the metal mountains”
Publications:
- The Magic Carpet Magazine, Vol. 3, no. 2, April 1933, (Apr 1933, ed. Farnsworth Wright, publ. Popular Fiction Publishing Co., $0.15, 132pp, Pulp, magazine) Cover: M. Brundage; Illust: Wilcox
 
- Swordsmen in the Sky, (1964, ed. Donald A. Wollheim, publ. Ace, #F-311, $0.40, 192pp, pb, anth) Cover: Frank Frazetta
 
- Kaldar: World of Antares, (Nov 1998, Edmond Hamilton, publ. Haffner Press, 1-893887-01-4, $55.00, iv+219pp, hc, coll) Cover: Jon Arfstrom
 
- The Magic Carpet Magazine, April 1933, (May 2007, ed. Farnsworth Wright, publ. Girasol Collectables, $25.00, 132pp, Pulp, anth) Cover: M. Brundage
 
- The Complete Magic Carpet Magazine, (Mar 2008, ed. Farnsworth Wright, publ. Girasol Collectables, $120.00, 640pp, hc, anth) Cover: Neil Mecham
 
- Swordsmen in the Sky, (date unknown, ed. Donald A. Wollheim, publ. Ace, #79276, $0.60, 192pp, pb, anth) Cover: Frank Frazetta