
The Sinister Invasion
An unassuming electrical engineer finds his routine shattered when a gray‑clad stranger appears at his doorstep, demanding his cooperation in a covert operation. Birrel’s skepticism turns to alarm as the visitor demonstrates a lethal skill set that hints at a hidden past in wartime intelligence, leaving him no choice but to follow.
Pulled into a midnight drive across the city, the pair slip past neon‑lit streets and into a forbidding industrial complex marked “Danger – Keep Out.” Inside, the stark, dimly lit factory feels far removed from Birrel’s modest apartment, and the air hums with an unsettling energy. As he steps deeper, he realizes he has been recruited for a purpose far beyond ordinary engineering work—one that may thrust him into a hidden world of espionage and extraterrestrial intrigue. The story sets the stage for a tense, high‑stakes adventure where an ordinary man must decide whether to embrace a destiny he never imagined.
Language
en
Duration
~2 hours (120K characters)
Publisher of text edition
Project Gutenberg
Credits
Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net
Release date
Jun 1, 2021
Rights
Public domain in the USA.

1904–1977
A major figure in classic American science fiction, he helped shape the space-opera tradition with sweeping adventures of interplanetary travel, cosmic danger, and heroic discovery. He is best remembered as the principal creator of Captain Future and for his imaginative work across pulp magazines and comics.
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