Frederik Pohl

Pórtico (La Saga de los Heechee 1)

Tras el incierto horizonte (La Saga de los Heechee 2)

El encuentro (La Saga de los Heechee 3)

Los anales de los Heechee (La Saga de los Heechee 4)

The Fifth Science Fiction Megapack

The Last Theorem

1940s Science Fiction - 20 Classic Science Fiction Short Stories From the 1940s: Bold Journeys Into the Unknown From Sci-Fi’s Golden Age

Lost Sci-Fi Books 241 thru 260: Twenty Forgotten Science Fiction Adventures from the Age of Rocketships and Strange Worlds

Science Fiction Grand Masters 6: Legendary Writers, Unforgettable Stories, And The Greatest Voices In Vintage Science Fiction — A Powerful Collection Of Classic Tales From The Science Fiction Grand Masters Who Shaped The Golden Age Of Science Fiction

Time Travel and Nothing But Time Travel 2: Twenty-Three Classic Journeys Through Time Where One Small Change Can Rewrite History

Vintage Sci-Fi 24 - 22 Science Fiction Short Stories from Philip José Farmer, Lester Del Rey, Robert Bloch, Frederik Pohl, Michael Shaara and more: Alien Visitors, Deadly Missions, And Strange Experiments From The Golden Age Of Vintage Science Fiction

The Tunnel Under The World: The Cost of Knowing the Truth