By Genre of Literary Work - Letters
- Letters from the Field, 1925-1975
- The Letters of Charles Lamb
- The Letters of D. H. Lawrence
- The Letters of Edith Wharton
- The Letters of Emily Dickinson
- The Letters of F. Scott Fitzgerald
- Letters of Heinrich and Thomas Mann, 1900-1949
- The Letters of Henry Adams
- The Letters of Jessie Benton Fremont
- The Letters of John Cheever
- The Letters of John Keats
- Letters of Katherine Anne Porter
- The Letters of Madame de Sévigné
- The Letters of Margaret Fuller
- Letters of Marshall McLuhan
- The Letters of Pliny the Younger
- The Letters of Robert Frost
- The Letters of Rudyard Kipling
- The Letters of Samuel Johnson
- The Letters of T. S. Eliot
- The Letters of Thomas Gray
- The Letters of Thomas Wolfe
- The Letters of Virginia Woolf
- The Letters of Walpole
- The Letters of William Cowper
- Letters on Cezanne
- Letters to a Young Novelist
- Letters to Felice
- Letters to Judy
- Letters to Olga
- Letters to Sartre
- Liber Amoris
- A Life in Letters, 1914-1982
- Life Sentences
- Lizzie
- Love from Nancy
- M. F. K. Fisher, a Life in Letters
- Marcel Proust
- Mark Twain's Letters
- Mark Twain’s Letters, Volume 4
- Miss You
- The Monitor Chronicles
- The Mulberry Tree
- The Noble Savage
- One Art
- Out in the World
- The Papers of Martin Luther King, Jr., Volume I
- The Papers of Martin Luther King, Jr., Volume II
- The Papers of Martin Luther King, Jr., Volume III
- Paris Journal, 1944-1965
