http://book.klll.cc/ebooks/subject/1539.opds?sort_order=downloads 2025-08-15T02:06:07Z Books about Learning and scholarship (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-15T02:06:07Z https://book.klll.cc/ebooks/subject/1539.opds?sort_order=title Sort Alphabetically by Title 2025-08-15T02:06:07Z https://book.klll.cc/ebooks/subject/1539.opds?sort_order=release_date Sort by Release Date 2025-08-15T02:06:07Z https://book.klll.cc/ebooks/71405.opds Verdadeiro metodo de estudar (Vol. I) (Portuguese) Luís António Verney 2025-08-15T02:06:07Z https://book.klll.cc/ebooks/4065.opds Side-Lights on Astronomy and Kindred Fields of Popular Science Simon Newcomb