Start with high-confidence civil liberties books, then narrow by subgenre or adjacent topics.
The Girl With Seven Names: a North Korean Defector’s Story
Unknown author
Biological Weapons
Jeanne Guillemin
Getting to Zero
Catherine Kelleher, Judith Reppy
The Lusaka Years
Hugh Macmillan
This Is an Uprising
Mark Engler, Paul Engler
Battlefield America
John W. Whitehead, Eric G. Dove
In the Name of Freedom
Enes Kanter Freedom
Joyful Militancy
Carla Bergman, Nick Montgomery
Bodies of Others
Naomi Wolf