Slavery by Another Name: The Re-Enslavement of Black Americans from the Civil War to World War II by Douglas A. Blackmon
This book reminds you exactly how many problems we see today have direct roots in enslavement. Especially impactful if you are interested in policing and prison abolition. If you read this one and enjoy it, I would recommend following it up with Alexander's New Jim Crow and Benjamin's Race After Technology.
https://app.thestorygraph.com/books/efd39d34-c684-4099-ac1a-c16fb99069bb