At several points in the book, I include links to articles on the blog that expand more fully on a topic. The article on operating cost is now online, here. Remember: If you don't understand operating cost, you don't understand transit!
Robert Cervero: The Transit Metropolis: A Global Inquiry
A rigorous but readable study of the transit choices made by a range of cities around the world, and how these choices have shaped the city for better or worse.
David Sucher: City Comforts: How to Build an Urban Village, Revised Edition
Engaging book on the details of creating welcoming urban space.
Allan B. Jacobs: Great Streets
The definitive book on the ingredients of a great urban streetscape.