http://book.klll.cc/ebooks/subject/20546.opds?sort_order=release_date 2025-08-09T08:35:40Z Books about United States -- History -- Civil War, 1861-1865 -- Secret service (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 2025-08-09T08:35:40Z https://book.klll.cc/ebooks/subject/20546.opds?sort_order=title Sort Alphabetically by Title 2025-08-09T08:35:40Z https://book.klll.cc/ebooks/subject/20546.opds?sort_order=downloads Sort by Popularity 2025-08-09T08:35:40Z https://book.klll.cc/ebooks/38497.opds Nurse and Spy in the Union Army S. Emma E. Edmonds 2025-08-09T08:35:40Z https://book.klll.cc/ebooks/34973.opds The Spy of the Rebellion Allan Pinkerton 2025-08-09T08:35:40Z https://book.klll.cc/ebooks/34344.opds The Boy Spy Joseph Orton Kerbey