Phantastes: A Faerie Romance for Men and Women is a fantasy novel by Scottish writer George MacDonald.
The story centres on the character Anodos ("pathless" in Greek) and takes its inspiration from German Romanticism, particularly Novalis. The story concerns a young man who is pulled into a dreamlike world and there hunts for his ideal of female beauty, embodied by the "Marble Lady". Anodos lives through many adventures and temptations while in the other world, until he is finally ready to give up his ideals.
'Phantastes' exerted a strong influence on fantasy authors of later generations; for example, C. S. Lewis claimed that his imagination had been baptized by reading it.