Thanks, Harry. When I look for a book I just do a google search for the book (and maybe author) and the word "epub". I already know if it is in the public domain in the US. Adelaide often shows up in the search results.
Still, it's good to know, since for good source sites, I may work my way through the library, as I have done for MR.
If anyone has a "best sites" short list for high-quality epubs, I'm