Martin Greenberg of Gnome Press had contracted to do a collection of his robot stories, proposing that it be called I, Robot. When Asimov replied that this was impossible—Eando Binder had published a story of that title in the thirties—Greenberg responded, “Fuck Eando Binder.” Asimov was also feeling envious of Heinlein’s success: “It was like having a stomachache in the mind, and it seemed to spoil all my fun in being a science fiction writer.”
