| title | ISBN-13 | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Die Planeten | 978-3-499-18011-8 | 1984 | Carl Sagan | |
| Early Japan | 978-1-223-04893-2 | 1970 | ||
| Live Longer Now: The First One Hundred Years of Your Life: The 2100 Program | 978-0-441-48514-7 | 1976 | ||
| The First Farmers | 978-0-316-84846-6 | 1974 | ||
J. L. · J. Leonard · J. Norton · Jonathan Leonard · Jonathan N. · N. Leonard
Ace · Hachette Book Group USA · Rowohlt Taschenbuch Verlag · Various small imprints