Discountbible.com has a small and very eclectic collection of free downloads.
For you who are very scholarly, you might be interested in one or both of two works which were just very recently added. One is the Babylonian Talmud in Hebrew, and the other is the Full Talmud, translated into English. I can't read Hebrew, so I don't know about the first one of those, but the second one is in the public domain. Hoŵever, both of them are very clean, a condition which you might find difficult to find elsewhere.
All 9 of the ebook downloads are probably in the PDF format--I know that both of the aforementioned tomes are.
Note that the last 2 downloads given on the webpage are _not_ free; in fact none of the last 3 are even books, per se.
https://www.discountbible.com/bible-...Downloads.html.