It's a bit dated in 2019, and he's obviously coming to come conclusions with political implications, but the basic framework of thought the book presents is not only educational, but fantastically useful. I read it at the end of undergrad and had my mind completely blown.
It’s a very good intro to economics. However, I generally recommend instead reading the work that it’s based on: That Which is Seen, and That Which is Not Seen by Frédéric Bastiat. [1]
Bastiat’s work is timeless, whereas Hazlitt’s, written to be consciously modern at the time, is showing it’s age.