“On the Duties of the Clergy” by St Ambrose.
Untrodden Peaks and Unfrequented Valleys by Amelia B. Edwards. Before she did Egypt (and inspired Elizabeth Peters’ Amelia Peabody) in A Thousand Miles Up the Nile, Edwards explored the South Tyrol region of Italy.
History of Holland by George Edmundson.
Dream Days by Kenneth Grahame. Children’s fiction and essays. Includes “The Reluctant Dragon”.
“Red Shadows” by Robert E. Howard. From the creator of Conan. Puritan adventurer Solomon Kane tracks his prey over land and sea and defies gods — all to avenge a woman he’d never met before.
Wonderwings and Other Fairy Stories by Edith Howes.
Chamber Music by James Joyce. A 1907 collection of his poems.
The Meditations by Marcus Aurelius. Thoughts of the Stoic emperor.
Brewster’s Millions by George Barr McCutcheon. A young man must go through a huge amount of money in one month to inherit an even greater sum.Yes, they made a movie out of it.
Anthem by Ayn Rand. Science fiction work by that crazy philosopher chick. Worth downloading, if only to know what the Rand fans get so excited about. (It has its moments, but you have to live in a culture that’s in pretty bad trouble to find Rand’s philosophy at all convincing or inspiring.)
The Moon Metal by Garrett P. Serviss. Early science fiction from an old school astronomer.
Sailing Alone Around the World by Joshua Slocum. If you want to learn about self-reliance, read this real life adventure, published in 1899.
The Fur Country by Jules Verne. Weird stuff happens, and it’s by Verne. Do you need to know more?
Old Indian Legends by Zitkala-Sa. 14 Dakota legends.
I should also note that a good chunk of the Bible is available from Librivox: the translations used are the American Standard Version and the World English Bible. There are also works up in many languages: French, Finnish, German, Chinese, and Japanese. There’s even a book in Old Church Slavonic.
Anybody can submit audiobook readings in any language, as long as they are reading something in the public domain.