This volume includes The Words Upon the Window-Pane, Fighting the Waves, The Resurrection, and The Cat and the Moon, plays based primarily on themes dealing with the supernatural. The introduction to the plays develop Yeats' theories of handling this type of material, his philosophy of life, his strange, eerie genius. The publishers are bringing out Collected Plays, twenty-two in all, and including all of those in the new volume with the exception of Fighting the Waves.