Carley, Wilfred, Whispers from a Continent The Literature of Contemporary Africa, Vintage Books, 1969

This book discusses many African writers, including Clark, and offers extensive commentary on The Raft

and its companion plays in the trilogy.

Falola, Toyin, et al., History of Nigeria 3. Nigeria in the Twentieth Century, Longman, 1993.

This history text considers many aspects of Nigerian history as it evolved from a British colony to self-rule. Graham-White, Anthony, The Drama of Black Africa, Samuel French, 1974.

This nonfiction text analyzes several African playwrights, including Clark, and spends a chapter discussing how his plays compare to Greek tragedies.

Wren, Robert IN, J P Clark, Twayne Publishers, 1984.

This critical biography considers the whole of Clark's career, including his dramatic works and poetry.