L. Hartmann · Lee Hartmann · Lee John Harding · Leo Hartmann · Leo Hartong · Lew Hartman
Harlequin Books · HarperCollins · Heyne
| title | ISBN-13 | year of publica- tion | |
|---|---|---|---|
| Der weinende Himmel. Fantasy Roman. | 978-3-453-00987-5 | 1989 | |
| Future Sanctuary | 978-0-373-72041-5 | 1976 | |
| Misplaced Persons | 978-0-06-022217-8 | 1979 | |
| The Fallen Spaceman | 978-0-06-022212-3 | 1980 |