Set in Europe during the Protestant Reformation and first published in 1799, St. Leon tells the story of an impoverished aristocrat who obtains the philosopher's stone and the elixir of immortality. In this philosophical fable, endless riches and immortal life prove to be curses rather than gifts and transform St. Leon into an outcast. William Godwin's second full-length novel explores the predicament of a would-be philanthropist whose attempts to benefit humanity are frustrated by superstition and ignorance.

This Broadview edition includes a critical introduction and full annotation. The appendices include contemporary reviews of the novel; Godwin's writings on immortality, the domestic affections, and alchemy; and selections from works influenced by St. Leon, most notably Mary Shelley's Frankenstein.