Open Culture article: 11,000 Digitized Books From 1923 Are Now Available Online at the Internet Archive
Same-day update: I’m already grabbing things. The first significant title is The Elephant Man and Other Reminiscences by Sir Frederick Treves. Not available for free at Google Books and until now only available as a pay-for book mainly in print.
Second same-day update: I did my best to try to scroll through all the entries but I don’t think it’s possible. I wound up getting duplicate listings. I don’t like the way the Archive has one continuous scroll nor that the entries aren’t bottom-aligned. This is a horrible interface and they really should know better and change it.