This is a two CD's in the set, and they are not sold separately. The two CD's comprise the last 18 Monon Employee Timetables from 4/28/52 through the end of the Monon. The 2nd. CD also has five public timetables from the first through 1967, plus an annotated timetable list of every employee timetable for the entire history of the Monon. This is quite a nice set for serious Monon historians.