And [Asimov]'ll sign anything, hardbacks, softbacks,....

“ And [Asimov]'ll sign anything, hardbacks, softbacks, other people's books, scraps of paper. Inevitably someone handed him a blank check on the occasion when I was there, and he signed that without as much as a waver to his smile — except that he signed: 'Harlan Ellison. ”

Isaac Asimov

From : Murder at the ABA