Public domain. Cover image from Project Gutenberg ebook #65437. Beware, the Usurpers! by Robert W. Krepps Download .m4b · 185 MB How to listen → · Problem with this narration? Let us know → Narrator Arthur — English RP Narrator (en-GB) Length 3 hr 2 min Language English Added November 9, 2026 Source ebook Project Gutenberg License Public domain FictionScience Fiction