http://book.klll.cc/ebooks/subject/21474.opds?sort_order=title 2025-08-15T18:14:57Z Books about Operetta (sorted alphabetically) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-15T18:14:57Z https://book.klll.cc/ebooks/subject/21474.opds?sort_order=release_date Sort by Release Date 2025-08-15T18:14:57Z https://book.klll.cc/ebooks/subject/21474.opds?sort_order=downloads Sort by Popularity 2025-08-15T18:14:57Z https://book.klll.cc/ebooks/36215.opds Famous Prima Donnas Lewis Clinton Strang 2025-08-15T18:14:57Z https://book.klll.cc/ebooks/42918.opds Standard Light Operas, Their Plots and Their Music George P. Upton