Liberty: Who Needs It?

What does “liberty” mean in a philosophical context? Jason Brennan parses out how the word is used.

Political Philosophy: An Introduction

https://www.libertarianism.org/books/political-philosophy-introduction

This book serves as an introduction to some of the major theories of justice, to the arguments philosophers have made for and against these theories, and, ultimately, to how to be more thoughtful and rigorous in your own thinking.