Subtitled "Dispatched from the Unfinished Civil War," this book conjures the remarkable interest of the re-enactors, unreconstructed confederates and others, rational and not-so-rational, in the Civil War. Horowitz, who combines trademark humor with investigative journalism, draws much history into this account of travels from Antietam to Gettysburg and Appomattox in the company of Robert Lee Hodge.  (USS35, $14.95)