
Transcriber's Note:
A solitary operative is thrust into a covert odyssey that threads the icy depths of the Black Sea with the dizzying politics of the early Cold War. After a routine naval cruise drops him overboard in Istanbul, Raphael Poe discovers a sleek, atomic‑powered one‑man sub that becomes his only lifeline as he slides upstream toward Moscow, navigating treacherous rivers, surfacing for air, and wrestling with a fledgling robot brain that mirrors his every move.
The narrative tackles the uneasy gulf between seeing and truly understanding, probing how even perfect telepathy can falter when messages must cross hostile borders. As Poe battles currents, mechanical limits, and the ever‑present threat of discovery, the story hints at the larger, shadowy web of espionage—where a lone spy is only a piece of a much larger, invisible ring.
Language
en
Duration
~1 hours (68K characters)
Publisher of text edition
Project Gutenberg
Credits
Produced by Sankar Viswanathan, Greg Weeks, and the Online Distributed Proofreading Team at http://www.pgdp.net
Release date
2009-11-18
Rights
Public domain in the USA.

1927–1987
A prolific mid-century science fiction and fantasy writer, he became especially well known for the Lord Darcy stories, where detective fiction meets an alternate world shaped by magic. He also wrote heavily for the pulp magazines of the 1950s and 1960s and collaborated with other major SF writers.
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