Learning does not stop when school does. These are for the adults who know that and are doing something about it. We've gathered our most thoughtful picks for the grown-ups on your list, from the Philomathy Primer, a beautifully designed guide to lifelong curiosity, to zines that tackle critical thinking, analog life, and positive change. For the parent, the partner, the friend who always has a book on the go and a question on the tip of their tongue.