I have found the following books to be interesting and useful to my teaching.
The Canon: A Whirligig Tour through Science by Natalie Angier
A Short History of Nearly Everything by Bill Bryson
The Art of Science by Joseph J. CarrA
Demon Haunted World: Science as a Candle in the Dark by Carl Sagan
Why People Believe Weird Things by Michael Shermer
How Would you Move Mount Fuji by William Poundstone
The Five Biggest Ideas in Science by Charles M. Wynn and Arthur W. Wiggins
Science as a Way of Knowing: The Foundations of Modern Biology by John Moore
Surely you’re Joking, Mr. Feynman by Richard Feynman
Contribute a couple the the books you have found interesting or helpful in the comments!