Understanding the Sky
$53
The weather book every instructor tells you to buy, and the one most pilots actually finish.
It works from the micro up: why the air does what it does over a specific hillside, then how that connects to the systems moving across a continent. That order matters, because the questions you have on launch are small and local before they are ever synoptic.
This is the 2022 edition. If you own one book about air, own this one.