One of the most chilling novels ever written about the oppression of totalitarian regimes--and the first to open Western eyes to the terrors of Stalin's prison camps, this book allowed Solzhenitsyn, who later became Russia's conscience in exile, to challenge the brutal might of the Soviet Union.

Moscow, Christmas Eve, 1949. The Soviet secret police intercept a call made to the American embassy by a Russian diplomat who promises to deliver secrets about the nascent Soviet Atomic Bomb program. On that same day, a brilliant mathematician is locked away inside a Moscow prison that houses the country's brightest minds. He and his fellow prisoners are charged with using their abilities to sleuth out the caller's identity, and they must choose whether...