Notes: "Arcturus Times Three" was translated by R[enata] Forti as "Tre contatti su Arcturus Beta" "Protection" was translated by R[oberta] Rambelli as "Il protettore" "The Spy in the Elevator" was translated by R[enata] Forti as "La spia nell'ascensore" "The Beat Cluster" was translated by R[enata] Forti as "Sfratto dallo spazio" "Mating Call" was translated by R[enata] Forti as "Estasi musicale" A Plague of Pythons was translated by R[oberta] Rambelli as "I distruttori" "Una rosa per Marte" is an original Italian shortstory