Here’s how I would rank them from favorite (1) to least favorite (6):

1 — Riddles in Mathematics
2 — The Multinationals
3 — British Herbs
4 — Know Your Own Personality
5 — Limitations of Science
6 — Changing Man’s Behaviour

Thanks for sharing these great old book covers. I love finding old books and magazines and seeing how the simplicity of the design is coming around again in current design.