Amerongen, G The Way Things Work. New York: Simon and Schuster, 1971.
A book explaining how various everyday machines and appliances operate.
Court, Nathan. Mathematics in Fun and in Earnest. New York: Macmillan Company, 1954.
A collection of interesting problems which get more and more difficult to solve as the book progresses.
Heron House Editors.The Book of Numbers. Heron House, New York,1978
A beautifully written book which gives written and graphical information on a great many topics of mathematics. Well done and enjoyable reading.
Hraitchik, Maurice. Mathematical Recreations. (second edition). New York: Dover Publications. Inc.. 1953.
Interesting collection of games type problems with cute aspects to catch the students’ attention.
Wylie. C 101 Puzzles in Thought and Logic. New York: Dover Publications, 1957.
The content of the book is completely described in the title.