Publisher's Weekly
Twenty-one years ago when the movie Fantastic Voyage was released, Asimov was hired to do the novelization. The book was successful but, to Asimov, not satisfying, for ''I never felt it to be entirely mine.'' Now he has rewritten it his way, and it's good. The story concerns Albert Jonas Morrison, a 21st century neurophysicist, and otherwise an ordinary and unheroic man, who is kidnapped and taken to the Soviet Union. A major Soviet scientist, Pyotr Shapirov, is in an irreversible coma, and Morrison's special expertise could be of value. The Soviets believe that Morrison may be able to apply his controversial theories to retrieve vagrant thoughts that still may be floating in Shapirov's damaged brain and so provide clues to important work in which Shapirov was engaged. Morrison goes cold with fear because the plan calls for him to be miniaturizedalong with four Soviet scientiststo sub-molecular size, introducing them into Shapirov's body and, ultimately, into his brain. The snappish relationships between the scientists is wryly depicted, and the mission itself makes fascinating reading as both an actionadventure and an intellectually stimulating premise. BOMC featured selection. (September 18)

Library Journal
The uncharted territory of the human brain becomes a landscape fraught with danger for a team of scientists who set out to discover its secretsfrom the inside. Twenty years after the success of his original Fantastic Voyage, the prolific and always illuminating Asimov creates a new scenario for an old premise and fills it with sympathetic characters, unexpected plot twists, and a heavy dose of science-made-comprehensible. Highly recommended. BOMC and Quality Paperback Book Club featured alternates. JC