Belle de Costa Greene, librarian/curator for J.P. Morgan's rare books, manuscripts, & art, was an interesting person & worth knowing about, but this nearly 500 page biography might not appeal to everyone (plus it's is a bit hard to find these days). I skimmed many parts where the details were not interesting to me. The fictionalized account of her story in the novel "The Personal Librarian" might be more interesting to some (I haven't read it).