For many years it was the rule on most railroads that trains which were not on the regular schedule were, for safety reasons, identified with white flags flown from the front of the locomotive. Over the years there were many thousands (tens of thousands) of these "extras" including chartered trains, private trains and specials. This book reviews and describes some of the more interesting ones beginning with the iconic circus trains and including political trains, funeral trains, advertising trains, Christmas trains, event celebration trains, military and wartime trains, royal trains, and much more. Loaded with more than two hundred illustrations, the book includes a detailed index and an extensive bibliography.