Public domain. Cover image from Project Gutenberg ebook #73679. The metal horde by Jr. John W. Campbell Download .m4b · 98 MB How to listen → · Problem with this narration? Let us know → Narrator Walter — American Narrator (en-US) Length 1 hr 32 min Language English Added November 3, 2026 Source ebook Project Gutenberg License Public domain FictionScience Fiction