For those interested in post-colonial studies, this text is the starting point. Achebe famously criticized it, while others defend it as a product of its time. To engage in this debate, you need to know the text inside out. A Heart of Darkness PDF is the most accessible way to do this. You can search for the specific passages that are the subject of controversy. The book is a lightning rod for critical discussion, a text that forces us to grapple with the legacy of racism and imperialism.