Gate of Ivory, Gate of Horn is a fantasy novel by British author Robert Holdstock. It was originally published in the United States in 1997 (and in the United Kingdom under the title Gate of Ivory in 1998.) The story is a prequel to Mythago Wood and explores Christian Huxley's quest into Ryhope Wood and the apparent suicide of his mother, Jennifer Huxley. The title of the book refers to the gates of horn and ivory described in both Homer's Odyssey and Virgil's Aeneid.