Hardcover NonfictionPublished: September 26, 2004 This Week Last Week Weeks On List 1 UNFIT FOR COMMAND, by John E. O'Neill and Jerome R. Corsi. (Regnery, $27.95.) A negative appraisal of John Kerry's conduct in Vietnam. 1 5 2 AMERICAN SOLDIER, by Tommy Franks with Malcolm McConnell. (ReganBooks/HarperCollins, $27.95.) A memoir by the former head of the United States Central Command. 2 6 3 MY LIFE, by Bill Clinton. (Knopf, $35.) From Hope, Ark., to the White House: the autobiography of the 42nd president. First Chapter 3 12 4 SKYWRITING, by Jane Pauley. (Random House, $25.95.) A memoir by the television...