The Fortress Series is a series of fantasy novels by science fiction an fantasy author C. J. Cherryh, published by HarperCollins. They are set in a medieval fantasy world featuring magic, sorcery, medieval warfare and other elements common to the High Fantasy subgenre. The first book in the series, Fortress in the Eye of Time, was published in 1995 and followed by Fortress of Eagles (1998), Fortress of Owls (1999), Fortress of Dragons (2000) and Fortress of Ice (2006).