Books: Knock, Knock

I KNOCK AT THE DOOR—Sean O'Casey —Macmillan ($2.50).

Sean O'Casey is the author of Juno and the Paycock, The Plough and the Stars, many another realistically wild Irish play about the lives of Ireland's poor. Less successful is this "autobiography," which covers only the first twelve years of his life. Gist: "Well, he'd learned poethry and had kissed a girl ... if he hadn' gone into the house, he had knocked at the door."