http://book.klll.cc/ebooks/subject/18838.opds 2025-08-05T21:27:13Z Books about Riddles, German (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 2025-08-05T21:27:13Z https://book.klll.cc/ebooks/31281.opds 500 Rätsel und Rätselscherze für jung und alt (German) Joseph Frick