One Day in the Life of Ivan Denisovich by Aleksandr Solzhenitsyn, translated by H. T. Willetts (Noonday Press, 1991; original published 1962)
This is must reading for the generation that never knew the Cold War. It's short and quick reading, 182 pages of fairly large print. Not easy reading, because of the subject (Soviet prison camp life), but although it's a little coarse in places, I'd still highly recommend it for our not-quite-13 grandchild. Solzhenitsyn is a Nobel prize winner with good reason, though America liked him a lot better when he was criticizing the Soviet Union than when he subsequently criticized the United States.