Jack Williamson was an American science fiction writer with one of the longest careers in the history of the genre, publishing from the late 1920s into the twenty-first century. The Mark of the Monster is an early work from his pulp period — fast-moving, imaginative adventure fiction characteristic of the science fiction and weird tales magazines where Williamson first made his mark.
For fans of classic pulp science fiction and the history of the genre, Williamson’s early work is essential territory. This free public-domain EPUB is available at Better Gutenberg.