http://book.klll.cc/ebooks/bookshelf/249.opds?sort_order=release_date 2025-09-22T00:48:10Z Books in Popular Science Monthly (sorted by release date) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-09-22T00:48:10Z https://book.klll.cc/ebooks/bookshelf/249.opds?sort_order=author Sort Alphabetically by Author 2025-09-22T00:48:10Z https://book.klll.cc/ebooks/bookshelf/249.opds?sort_order=title Sort Alphabetically by Title 2025-09-22T00:48:10Z https://book.klll.cc/ebooks/bookshelf/249.opds?sort_order=downloads Sort by Popularity 2025-09-22T00:48:10Z https://book.klll.cc/ebooks/43391.opds Appletons' Popular Science Monthly, December 1898 Various 2025-09-22T00:48:10Z https://book.klll.cc/ebooks/987.opds The Scientific Monthly, October to December, 1915 Various