The Darkroom of Damocles is a war novel by the Dutch writer Willem Frederik Hermans, published in 1958. An immediate success since it was first published, the novel has been printed in numerous editions and is considered one of the greatest World War II novels. The book has been translated into English twice, in 1962 by Roy Edwards, and again in 2007 by Ina Rilke. It was adapted into the 1963 film Like Two Drops of Water, directed by Fons Rademakers. Le Carré's spy novel The Spy Who Came in from the Cold was in part inspired by The Darkroom of Damocles by Hermans, who suspected plagiarism.

Willem Frederik Hermans was a Dutch author of poetry, novels, short stories, plays, as well as book-length studies, essays, and literary criticism. His most famous works are The House of Refuge, The Darkroom of Damocles, and Beyond Sleep.