Against Borders: The Case for Abolition
This is an nice introduction to the topic of abolition of borders. Maybe you're already familiar with the idea of defunding the police, or similar, but this work extends that to the idea of borders themselves. It's quite interesting to see this idea brought there; and moreover it's quite nice to see a challenging discussion about the damaging impact of deporting or otherwise removing citizenship of people on visas; i.e. how can we care about people even when they do something bad. Lots of good ideas in this book!