The Lost Subways of North America has 86 transit maps, in addition to area maps of each of the 23 regions discussed. I've provided links to high-resolution electronic copies below, indexed by chapter.
Chapter 1:
Atlanta
The City Too Busy To Hate
Chapter 2:
Boston
Urban Institutions, Megaprojects and City Revival
Chapter 3:
Chicago
The Loop Elevated: A Beloved Steel Eyesore
Chapter 4: Cincinnati
A Short History of a Never-Used Subway
Chapter 5: Cleveland
Transit and the Perils of Waterfront Redevelopment
Chapter 6:
Dallas
They Don't Build Them Like They Used To
Chapter 7:
Detroit
The City-Suburban Rift and the Most Useless Transit System in the World
Chapter 9:
Los Angeles
72 Suburbs in Search of a City
Chapter 10:
Miami
Overpromise, Underdeliver
Chapter 12:
Montreal
The Metro as Showcase Megaproject
Chapter 13:
New Orleans
How a Big City Grew into a Small Town
Chapter 14:
New York
The Tortured History of the Second Avenue Subway
Chapter 15:
Philadelphia
How Not to Run a Railroad
Chapter 17:
Richmond
The First Streetcar System
Chapter 19:
San Francisco
The View from Geary Street
Chapter 20:
Seattle
Consensus Through Exhaustion
Chapter 21:
Toronto
Subway Line as Political Football
Chapter 22:
Vancouver
Chapter 23:
Washington DC
The Freeway Revolt and the Creation of Metro