Robert A. Heinlein

Stranger in a Strange Land

Starship Troopers

The Moon Is a Harsh Mistress

Starship Troopers

Time Enough for Love

Orphans of the Sky

X Minus One: Complete

Stranger in a Strange Land

Farmer in the Sky (Unabridged)

Beyond This Horizon (Unabridged)

Ciudadano de la galaxia

50 Vintage Sci-Fi Short Stories 4 - More than 29 hours of Vintage Science Fiction: From Mary Shelley to Philip K. Dick — 29 Hours of Sci-Fi That Shaped the Future