Set of 25 books on a whole range of science topics, plus one index book.
Published by Time-Life company.
Each book is about 200 pages.
Book titles:
The Physician
Planets
The Scientist
Energy
The Engineer
Matter
The Mind
Food and Nutrition
Flight
Ships
Sound and Hearing
Time
Water
Weather
Wheels
Light and vision
Machines
Man and Space
Mathematics
Growth
Health and disease
The Body
The Cell
Giant Molecules
Drugs
And lastly, the 26th book, A Guide to Science + Index