The Queen of Air and Darkness, originally titled The Witch in the Wood, is a novel by English writer T. H. White. It is the second book in his epic work, The Once and Future King. It continues the story of the newly-crowned King Arthur, his tutelage by the wise Merlyn, his war against King Lot, and also introduces the Orkney clan, a group of characters who would cause the eventual downfall of the king. First published in 1939, it was re-released under the new title after some editing.
The title comes from a poem by A.E. Housman. It refers to Morgause, Witch-Queen of the Orkney Islands. She has four sons but does not care for them, and prefers her magic. She serves as the main antagonist for this book and as a secondary antagonist for the next book, The Ill-Made Knight.
The Queen of Air and Darkness is the second book in the four-part work The Once and Future King which chronicles White's own version of the legend of King Arthur. Although it is the shortest book in the series, it is a vital point in the story for several reasons.