This book documents the human rights abuses in colonial Congo at the end of the 19th and beginning of the 20th centuries. It's a story that almost everyone has forgotten, even though it was the basis for Joseph Conrad's Heart of Darkness. People assume that Heart of Darkness is supposed to be a wider metaphor for man's ability to commit horrible acts, but when it was written it was meant to be taken literally, as a barely fictionalized tale of what was happening in the Congo at the time. King Leopold's Ghost is very well researched and written. I'd recommend it to people who like non-fiction and history.