[en] [Gutenberg 7834] • Wagner's "Tristan und Isolde": An Essay on the Wagnerian Drama Public Domain Books
[en] [Gutenberg 54426] • Modern Musical Drift Potter Press
[en] [Gutenberg 60271] • From Newton to Einstein: Changing Conceptions of the Universe Kessinger Publishing
[en] [Gutenberg 42150] • With Sully into the Sioux Land Forgotten Books
[en] [Gutenberg 42228] • Camp Fire Yarns of the Lost Legion Forgotten Books
[en] [Gutenberg 1724] • Finished Boomer Books