X-link to the DRM-free megathread for this Tuesday's Wildside Press freebie:
Prospector's Special by the late Robert Sheckley, an vintage planetary adventure novelette set on Venus, originally published in Galaxy magazine in 1959.
Also, if you like that kind of setting, there's also a bundle offer for an retro SF RPG done in that old school style which deliberately harkens back to the golden age pulps, by the makers of the rather nifty tie-in RPG for Charles Stross' Laundry Files novels.