[en] [Gutenberg 30866] • Analysis of Mr. Mill's System of Logic Public Domain Books
[de] [Gutenberg 53232] • Spitzweg, Reime und Bilder Forgotten Books
[en] [Gutenberg 42344] • My Airships; The Story of My Life Dover Publications
[en] [Gutenberg 32234] • The Lion of Janina; Or, The Last Days of the Janissaries: A Turkish Novel Kessinger Publishing