Publisher's Synopsis
This science fiction adventure involves Comrade Pyotr Shapirov, a stricken Soviet scientist, who has a secret of vital importance to world science.;The only man with the skill and knowledge to extract it from the scientist's comatose brain is an American, Albert Morrison, who has to be miniaturized down to a microscopic fraction of his normal size to undertake the mission.;In a vast underground laboratory the "impossible" is achieved and he is injected into Shapirov's veins to travel deep into the unchartered regions of the human brain.;With only twelve hours to accomplish his task the American struggles against unknown terrors in search of thought itself while Shapirov's life hangs precariously in balance.;The author also wrote "Fantastic Voyage"(1966) to which this book is a sequel, and the "Foundation" series.
