
In a bustling future where Earth’s cities tower above a network of interplanetary routes, the mail‑carrier Planetara darts between Venus, Mars, and a secretive Moon mission. When crew members Gregg Haljan and his quick‑witted friend Dan “Snap” Dean are summoned to the subterranean headquarters of Divisional Detective Colonel Halsey, the atmosphere shifts from routine to tension. Their commander, the imposing Captain Carter, joins the interrogation, demanding to know how word of the clandestine Grantline Moon Expedition has leaked.
The Moon, still a barren, unclaimed frontier, is rumored to hide mineral riches coveted by rival Martian interests, and the expedition’s silence has been paramount. As the trio faces probing questions, old friendships and loyalties are tested, and the possibility of hidden conspirators looms large. Listeners are drawn into a tight‑knit mystery of interplanetary politics, secret voyages, and the thin line between duty and danger.
Language
en
Duration
~6 hours (387K characters)
Publisher of text edition
Project Gutenberg
Original publisher
Copyright, 1931, by Ray Cummings
Credits
Produced by Greg Weeks, Jason Isbell, Sankar Viswanathan, and the Online Distributed Proofreading Team at http://www.pgdp.net
Release date
2006-08-16
Rights
Public domain in the USA.
Subjects

1887–1957
A prolific early science-fiction writer, he helped shape the pulp era with fast-moving adventures and imaginative ideas about time, space, and strange new worlds. He is especially remembered for stories like The Girl in the Golden Atom, which brought big cosmic wonder to magazine readers.
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