Uptown, Downtown chronicles of history of rapid transportation in New York City, starting with the horsecar lines. It covers the shortlived pneumatic railway, the founding of the IRT and BMT, the els and eventually the IND. I wish instead of switching to a collection of stories about the subway half way through, it went into more detail at each point in the history of the system. Despite that, it does cover the Malbone Street Wreck in more detail and context than anything else I’ve read or seen.