I'm surprised no one has mentioned Basic Economics[1] by Thomas Sowell.

It's a fairly detailed book but it's worth the time. If you're too busy to read a whole book, you might want to take a look at "Economics in One Lesson" [2] by Herny Hazlitt.

The foundation for economic education[3] has some great articles too about economics and public choice.

[1]https://www.amazon.com/Basic-Economics-Thomas-Sowel/dp/04650... [2] https://fee.org/media/14946/economicsinonelesson.pdf [3] https://fee.org