I'd like to inform you about two books that are (or are about to be) published, and for which the Forum has already assigned reviewers: Horn, Jason Gary. _Mark Twain: A Descriptive Guide to Biographical Sources_. Lanham, MD: The Scarecrow Press, Inc., 1999. Cloth, 5-3/4" x 8-3/4". Pp. x + 133. Chronology, indexes. $32.50. ISBN 0-8108-3630-0. McCullough, Joseph B., and Janice McIntire-Strasburg (eds.). _Mark Twain at the "Buffalo Express": Articles and Sketches by America's Favorite Humorist_. DeKalb: Northern Illinois University Press, 1999. Cloth. Pp. 357 [?]. Notes, index. $30.00. ISBN 0-87580-249-4. Reviews of the above are scheduled to appear by the end of August. Taylor Roberts Book review editor, Mark Twain Forum