William D. Middleton is in a class by himself. Through the years he has authored boos on mass transit, railroad bridges, and as well as the ultimate trilogy of American electric rail - Time of the Trolley (about street cars), When the Steam Railroads Electrofied (heavy rail) and the subject of this book, The Interurban Era.
Interurbans were a hybrid cross between light urban rail (trollies) and heavy Inter-city rail (passenger trains). Interurbans were everywhere in the years between 1880 and 1950. The rise of the interurban coincided with the the birth and growth of the American suburb.
Mr. Middleton's books are American Classics and should be read often! A+