The product is a hardcover book titled "Penn Central Power" by Robert J Yanosey.
PENN CENTRAL POWER, Vol. 4, 7500-9999, Intermediate HP Roadswitchers & Switchers
PENN CENTRAL POWER, Vol. 1: 1000-3999 Freight Cab Units & Road Switchers - (NEW)
PENN CENTRAL POWER In Color, Vol. 3, 6000–7499, Six-Axle Diesels and GP9s (NEW)
PENN CENTRAL POWER, Vol. 2: 4000-5999 Passenger Cab Units & Roadswitchers (NEW)
Penn Central Railroad by Peter E. Lynch