We’ve had a pretty extraordinary May. We cataloged our 1,500th book, James Baldwin’s children’s history book, Four Great Americans, which was a great accomplishment. (Considering seven months ago we were at 1,000).

But we also had an impressively productive month: we released 115 (!) audiobooks into the public domain, almost four per day. Our previous record for monthly production was 77, reached in July 2007.

For those looking for some suggestions, here are a few gems from the catalog:

• Enviro/sci-fi/horror surprise, Greener Than You Think, by Ward Moore
• Cervantes’ Don Quixote, in Spanish and English
• Dream Psychology, by Sigmund Freud
• Tree-swinging favorite, Tarzan of the Apes by Edgar Rice Burroughs
• The beautiful Japanese zenish masterpiece, Book of Tea, by Okakura Kakuzo
• Cosmological page-turner, Relativity: The Special and General Theory, by Albert Einstein.
• John Stuart Mill’s handbook for ethical philosophizing, Utilitarianism
• Rudyard Kipling’s Indian adventure yarn, Kim
• Supercomupter scifi classic, The Cosmic Computer, by H. Beam Piper
• Voltaire’s Candide, en francais, bien sur.

Find out how to volunteer here.