| Series | № | Title | Authors | Country | Date |
|---|---|---|---|---|---|
| Penguins | 893 | The 'Observer' Second Crossword Puzzle Book | United Kingdom | 1953 | |
| Penguins | 987 | One Hundred Crossword Puzzles | United Kingdom | 1954 | |
| Penguins | 1002 | The Long Escape | David Dodge | United Kingdom | 1954 |
| Penguins | 1007 | With a Bare Bodkin | Cyril Hare | United Kingdom | 1954 |
| Penguins | 1029 | The New Statesman Crossword Puzzle Book | United Kingdom | 1954 | |
| Pelicans | A424 | Medieval Thought | Gordon Leff | United Kingdom | 1958 |