Level 7 is the diary of Officer X-127, who is assigned to stand guard at the electronic controls of an intercontinental missile system, designed to wage nuclear war. Located in underground installations four thousand feet deep, Level 7 has been built to withstand the most devastating attack and to be self-sufficient for five hundred years. Selected according to a psychological profile that assures their readiness to destroy all life on Earth, those who are sent down may never return. Originally published in 1959, translated into fourteen languages, and with over 400,000 copies sold, this powerful dystopian novel remains a horrific vision of where the nuclear arms race may lead. Yet, implicitly, it is an affirmation of human life and love. Level 7 should be considered a must-read by all science fiction fans as well as those concerned about human fate in the nuclear age. The new critical edition contains additional related material, some previously unpublished, as well as a preface by the author and an introduction by the editor of the volume, David Seed, professor of English literature at the University of Liverpool, England.