@Tess I had forgotten about Berg's Linbergh bio which interested me when it first came out. I will look for "Paris 1919" - thanks! I'm reading the Wilon bio a few chapters each week in between other books so will take me a while to finish.
A very readable book about the Transcendalists is "American Bloomsbury: Louisa May Alcott, Ralph Waldo Emerson, Margaret Fuller, Nathaniel Hawthorne, and Henry David Thoreau: Their Lives, Their Loves, Their Works" by Susan Cheever. Whew! Long title - very good book.