Del Rey / Ballantine, 1977. Paperback, 1st printing. Brown was a master of short-form science fiction. Introduction by Robert Bloch, and these stories: "Arena" (1944); "Imagine" (1955. poem); "It Didn't Happen" (1963); "Recessional" (1961); "Eine Kleine Nachtmusik" (1965, with Carl Onspaugh); "Puppet Show" (1962); "Nightmare in Yellow" (1961); "Earthmen Bearing Gifts" (1960); "Jaycee" (1955); "Pi in the Sky" (1945); "Answer" (1954); "The Geezenstacks" (1943); "Hall of Mirrors" (1953); "Knock" (1948); "Rebound" (1960); "Star Mouse" (1951); "Abominable" (1960); "Letter to a Phoenix" (1949); "Not Yet the End" (1941); "Etaoin Shrdlu" (1942); "Armageddon" (1941); "Experiment" [Two Timer]" (1954); "The Short Happy Lives of Eustace Weaver I" (1961); "The Short Happy Lives of Eustace Weaver II" (1961); "The Short Happy Lives of Eustace Weaver III" (1961); "Reconciliation" (1954); "Nothing Sirius" (1944); "Pattern" (1954); "The Yehudi Principle" (1944); "Come and Go Mad" (1949); "The End" (1961).