A Boy’s Best Friend (El mejor amigo de un muchacho). Copyright © 1975 by the Boy Scouts of America.
Sally (Sally). Copyright © 1953 by Ziff-Davis Publishing Company; Copyright renovado por Isaac Asimov, 1981.
Someday (Algún día). Copyright © 1956 by Royal Publications, Inc.
Point of View (Punto de vista). Copyright © 1975 by the Boy Scouts of America.
Think! (¡Piensa!). Copyright © 1977 by Davis Publications, Inc.
True Love (Auténtico amor). Copyright © 1977 by The American Way.
Robot AL-76 Goes Astray (Robot AL-76 extraviado). Copyright © 1941 by Ziff-Davis Publishing Company; Copyright renovado por Isaac Asimov, 1968.
Victory Unintentional (Victoria inintencionada). Copyright © 1942 by Fictioneers, Inc.; Copyright renovado por Isaac Asimov, 1969.
Stranger in Paradise (Extraño en el paraíso). Copyright © 1974 by UPD Publishing Corporation.
Light Verse (Versos Luminosos). Copyright © 1973 by The Saturday Evening Post Company.
Segregationist (Segregacionista). Copyright © 1967 by Abbott Universal Ltd.
Robbie (Robbie). Copyright © 1940 by Fictioneers, Inc.; Copyright renovado por Isaac Asimov, 1967.
Let’s Get Together (Unámonos). Copyright © 1956 by Royal Publications, Inc.
Mirror Image (Imagen en un espejo). Copyright © 1972 by Conde Nast Publications, Inc.
The Tercentenary Incident (El incidente del Tricentenario). Copyright © 1976 by Isaac Asimov.
First Law (Primera Ley). Copyright © 1956 by King-Size Publications, Inc.
Runaround (Círculo vicioso). Copyright © 1942 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1968.
Reason (Razón). Copyright © 1941 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1968.
Catch That Rabbit (Atrapa esa liebre). Copyright © 1944 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1971.
Liar! (¡Embustero!). Copyright © 1941 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1968.
Satisfaction Guaranteed (Satisfacción garantizada). Copyright © 1951 by Ziff-Davis Publishing Company; Copyright renovado por Isaac Asimov, 1979.
Lenny (Lenny). Copyright © 1957 by Royal Publications, Inc.
Galley Slave (Esclavo en galeras). Copyright © 1957 by Galaxy Publishing Corporation.
Little Lost Robot (El robot perdido). Copyright © 1947 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1974.
Risk (Riesgo). Copyright © 1955 by Street & Smith Publications, Inc.
Escape! (¡Fuga!). Copyright © 1945 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1972.
Evidence (Evidencia). Copyright © 1946 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1973.
The Evitable Conflict (El conflicto evitable). Copyright © 1950 by Street & Smith Publications, Inc.; Copyright renovado por Isaac Asimov, 1977.
Feminine Intuition (Intuición femenina). Copyright © 1969 by Mercury Press, Inc.
… That Thou Art Mindful of Him (Qué es el hombre). Copyright © 1974 by Mercury Press, Inc.
The Bicentennial Man (El hombre del bicentenario). Copyright © 1976 by Random House, Inc.