As a PPL student, I agree that Langeweische's book is a great way of learning how AoA and your judgement of it is so critical.
However, Langeweische's means of explaining it hasn't been updated for 30 years and is fairly difficult to understand at first glance. So instead I use John Denker's
See How it Flies for a far more in depth, linked understanding of aerodynamics and AoA at work. Best of all, it's free and available online
