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A fabulous adventure into the last frontier of man!

Attention! This is the last message you will receive until your mission is completed. You have sixty minutes once miniaturization is complete. You must be out of Benes' body before then. If not, you will return to normal size and kill Benes regardless of the success of the surgery.

Four men and one woman reduced to a microscopic fraction of their original size, boarding a miniaturized atomic sub and being injected into a dying man's carotid artery. Passing through the heart, entering the inner ear where even the slightest sound would destroy them, battling relentlessly into the cranium.

Their objective... to reach a blood clot and destroy it with the piercing rays of a laser.

At stake... the fate of the entire world.

Deep within Russia, would-renowned scientist Pyotor Shapirov lies in a coma. Locked within his brain rests the key to the greatest scientific advance in the world's history. Only one scientist can hope to locate this secret—Dr. Albert Jonas Morrison, an American. Morrison's mission: to be miniaturized to molecular size along with a team of four Soviet scientists, travel in a specially designed submarine to the dying Shapirov's brain, and tap the secrets held there. Morrison and his companions have only twelve hours to accomplish their task—in the face of unexpected terrors and with their own lives hanging precariously in the balance.

With his phenomenal two-million-copy bestseller Fantastic Voyage, Isaac Asimov took the world on its first amazing journey into the human body. Now, twenty year later, after deeper exploration into one of the most fascinating areas of science, Dr. Asimov delivers an all-new thriller that transports you to the far reaches of inner space. Electrifying, astonishing, and remarkably realistic, this new novel is certain to become a science fiction classic.