
A tense Cold‑War tableau unfolds as covert operatives race against geography and politics. The story opens aboard a U.S. Navy cruiser cruising the Mediterranean, where a solitary passenger—an enigmatic agent known only as Raphael Poe— watches the world pass by, his mind already rehearsing a mission that will take him far beneath the surface of the Black Sea.
When the ship docks in Istanbul, Poe slips away into a sleek, torpedo‑shaped, one‑man vessel powered by a compact atomic reactor. He pilots the craft upstream through the Bosphorus, the Dnieper and beyond, confronting narrow channels, unexpected obstacles, and the claustrophobic pressure of isolation. Each night he surfaces to recalibrate his bearings, while the sub’s nascent artificial brain records every twist of the river for a daring reverse‑engineered return.
The narrative weaves together espionage, emerging cybernetic technology, and the uneasy question of whether perfect telepathy can ever translate into flawless communication. As Poe presses forward toward Moscow, the stakes of his solitary quest begin to echo the larger, shadowy games played by nations on both sides of the Iron Curtain.
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 lively, versatile voice in mid-20th-century science fiction and fantasy, he wrote everything from space adventure to clever mystery-fantasy crossovers. He is especially remembered for the Lord Darcy stories, which blend detective fiction with an alternate world shaped by magic.
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