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2. Dawson, P. M. S. The Unacknowledged Legislator: Shelley and Politics. Oxford: Clarendon Press, 1980.
3. Godwin, William. Enquiry Concerning Political Justice. Ed. Isaac Kramnick. Harmondsworth, England: Penguin Books, 1985.
4. Grabo, Carl. A Newton Among Poets: Shelley's Use of Science in Prometheus Unbound. New York: Cooper Square, 1968.
5. Holmes, Richard. Shelley: The Pursuit. New York: Dutton, 1975.