1. Achebe, Chinua. “‘An Image of Africa’: Racism in Conrad’s Heart of Darkness.” Heart of Darkness: An Authoritative Text, Backgrounds and Sources, Criticism, edited by Robert Kimbrough, W. W. Norton & Company, 1988. Chinua Achebe critiques Joseph Conrad's portrayal of Africa in Heart of Darkness as racially prejudiced.
2. Bloom, Harold, editor. Marlow. Chelsea House Publishers, 1992. This book, edited by Harold Bloom, provides a collection of critical essays and perspectives on the character Marlow, prominent in Conrad's works.
3. Cheng, Yuan-Jung. Heralds of the Postmodern: Madness and Fiction in Conrad, Woolf, and Lessing. Peter Lang Publishing, 1999. Yuan-Jung Cheng analyses the connections between madness and fiction in the works of Conrad, Woolf, and Lessing, underlining their transition to postmodernism.
4. Eagleton, Terry. Criticism and Ideology: A Study in Marxist Literary Theory. Verso, 2006. (Reprint edition). Terry Eagleton offers a Marxist lens for examining literary theory and its implications in societal structures and ideologies.
5. Firchow, Peter Edgerly. Envisioning Africa: Racism and Imperialism in Conrad’s Heart of Darkness. University Press of Kentucky, 2000. Firchow delves into Heart of Darkness, focusing on its representations of Africa, and the themes of racism and imperialism.
6. Guetti, James L. The Limits of Metaphor: A Study of Melville, Conrad, and Faulkner. Cornell University Press, 1967. James L. Guetti explores the boundaries of metaphorical expressions within the literary works of Melville, Conrad, and Faulkner.