As an avid reader who’s always on the lookout for free online resources, I’ve come across a few places where you might find 'First Ladies' or similar books. Project Gutenberg is a fantastic starting point—it offers a vast collection of public domain books, though newer titles might not be available there. Open Library, run by the Internet Archive, is another great option; it allows you to borrow digital copies of books, including some about first ladies, for free.
If you’re specifically looking for biographies or historical accounts, websites like ManyBooks or Librivox (for audiobooks) sometimes have free options. I’ve also stumbled upon academic platforms like JSTOR or Google Scholar, where you can find scholarly articles or excerpts, though full books might be rare. Just remember to check the legality of the source—some sites offer free reads, but they might not be authorized. Always opt for legitimate platforms to support authors and publishers.