| Answer | Crossword Clue |
|---|---|
| ISAAC | Prolific writer Asimov |
| ISAAC | Prolific Asimov |
| ANON | Prolific writer |
| ANON | Prolific writer. |
| ANON | Prolific writer?: abbr. |
| ASIMOV | Prolific writer Isaac |
| ALGER | Prolific writer of juveniles. |
| EULER | Prolific writer on calculus |
| NORA | Prolific romance writer Roberts |
| ASIMOV | Prolific sci-fi writer |
| YAKOV | ... Perelman, prolific Russian science writer |
| ALGER | Prolific writer of boys' stories. |
