"Economics in one lesson" is a classic worth reading and thinking about. While you don't necessary have to follow the libertarian way of thinking it guides you to, it still shapes your critical thinking about economic policies a lot.
EIOL is a representation of one school of economic thought up to a certain time. It includes many of the principles taught to high school and 101-level college students, but it may mislead readers who are unaware that there are other models, and other conclusions, that more recent research have uncovered. In other words, it's much like recommending a book that includes the Aristotelian and Galilean theories of gravity: yes, it's useful to know, but only in an historical context.
I think of it as the following: the book is how the fundamentals really are. Taking those fundamentals and truths, you apply some smaller adjustments to make a world worth living.
Wikipedia entry on it, which skimming seems to be fair: https://en.wikipedia.org/wiki/Economics_in_One_Lesson and I note it was published in 1946, making it something of a classic. There a links to multiple versions of free on-line copies of it at the bottom.
