Bergonzi, Bernard, The Early H. G. Wells: A Study of the Scientific Romances, University of Toronto Press, 1961.

Wells changed much after the turn of the twentieth century. By focusing on the early novels, Bergonzi is able to give concentrated consideration to the style that was evolving.

Haynes, Roslynn D., H. G. Wells: Discoverer of the Future, New York University Press, 1980.

Haynes focuses on the influence of science on Wells's ideas, giving the history of scientific development in the nineteenth and twentieth centuries in the balance.

Hillegas, Mark R., The Future as Nightmare: H. G. Wells and the Anti-Utopians, Southern Illinois University Press, 1967.

This book is principally about Wells, but it draws connection to the other writers who have raised fears about what the future might bring, including George Orwell (1984) and Aldous Huxley (Brave New World).

Huntington, John, "The Logical Web," in The Logic of Fantasy...