The current collection is the "Great American Cities Series", a work in progress. "Manhattan and its Neighborhoods" is represented in both vertical and horizontal orientations. "Lower Manhattan" is a larger scale map that shows greater detail of that more densely-configured part of the city. "Boston Central Neighborhoods" shows the oldest and most visited parts of that city. "Las Vegas-Downtown and the Strip" narrows the focus to the essential spine of that unique city.
San Francisco is in the works, to be followed by the other great American cities (the author reserves the right to define greatness.)