Notes
The Flame of Iridar, a The Mysteries of Mars novella by Lin Carter.

A prelude of sorts to a loosely connected series of stories set on Mars.

This volume is a "dos-à-dos" omnibus in the Belmont Double series. It also includes Peril of the Starmen by Kris Neville.

Publisher's Blurb – Lower Cover
From out of the gloom in the dungeon where Chandar, Prince of Orin, awaited a tortured death, Sarkond the Enchanter shimmered into reality. His emerald eyes gleamed with an inhuman lustre as, with a soundless command, and without a touch, he mysteriously released the chains which bound Chandar. The prize Sarkond then offered Chandar was freedom, the price – the timeless struggle between two opposing forces . . . a man who used the secret powers of the universe for his own schemes . . . a man who vowed to stop him by his own strength and wits.