Robert E. Margroff has 2 audiobooks on Listento.it, narrated by 2 narrators. The most-rated is The Ring.
The E.S.P. Worm
Summary
The cast of cosmic characters: A prodigal worm, a telepathic, egotistical, totally unscrupulous little alien running away from his father becomes the biggest prize in the universe. Capture the slimy brat and win an entire planet! A cosmic hustler, an effete snob who ekes out a comfortable living as the president's son-in-law and perfects his reflexes with endless contests of cosmic pool, becomes the most important element in a delicate game of interspatial espionage - and the galaxy's prime target for assassination. The most sensual woman on Earth, completes the star-crossed triangle in one of the wildest, wickedest romps in the annals of science fiction!
©1970, 2002 Piers Anthony and Robert E. Margroff, This edition published in 2014 by Open Road Integrated Media, Inc. (P)2014 Audible Inc.
The Ring
Summary
After a youth spent trapped in space exile, Jeff Font returned to Earth to seek vengeance against the planetary mogul who had framed and destroyed his family. Jeff's plans backfired: He was captured, drugged, rammed through a computerized court system, convicted... and ringed. The ring. The ultimate high-tech civics lesson. A surgically implanted electronic monitor that automatically caused unendurable agony when a convict strayed from righteousness. A ringer would do no evil, think no evil, see or hear evil robocops - nor defend himself or others from insult or injury. And in a corrupt world of licensed sin and satanic parties, floral estates, and city-size slums, ringers were the ultimate victims. But the ring's data banks had not factored in Jeff Font's strength, courage, and his will to fight society, the world, and the agony of the ring to unravel the plot that entrapped him - and see justice done.
©1968, 2002 Piers Anthony and Robert E. Margroff, This edition published in 2014 by Open Road Integrated Media, Inc. (P)2014 Audible Inc.