Unless you’ve been living under a rock for the last four years, you’ll have heard about the Black Lives Matter (BLM) movement that began in the United States. This book gets inside it. Read it to understand what the movement is about, how it started, and why phrases like “all lives matter” and “blue lives matter” entirely miss the point of BLM.
This is not a history book, though. If you want dates and events and the names of actual African-Americans who have died as a result of police violence, Wikipedia would be a better place to start.