I also found a mass market paperback of The Other Side of Ethel Mertz: The Life Story of Vivian Vance. I can't believe I have never looked at this title before, as Vance (famous for her role in I Love Lucy) and Louise Brooks knew each other as kids in Kansas. Barry Paris covers their friendship in his biography, and the authors of this book devote three paragraphs to the "local girl whose warm smile and expressive eyes exuded that special something."
I also found a few titles for my friend Amanda, who I know enjoys film books. For Amanda, I found The Talmadge Girls by Anita Loos, a biography of Marion Davies by Fred Laurence Guiles (that's the book I am reading now), and The Paramount Pretties, by James Robert Parish (profiles of various stars associated with the studio). Each are uncommon, worthwhile titles. Each orphaned, I knew they needed a home.