As the title suggests, most of this book is about the success of Bryant Park, a park in midtown Manhattan that was once overrun with drug dealers and now has become a popular public space. Manshel worked for the Bryant Park Restoration Corporation (BPRC), a private entity that managed the park.
What went right? Manshel worked for the describes Bryant Park's success as an example of "placemaking" - a variety of small steps that, through a process of trial and error, make the park more attractive. For example, BPRC installed movable chairs. Why movable chairs? Because 1) movable chairs allow visitors to control their space and 2) the fact that they are not attached to the ground conveys a message of safety and order. BPRC also bought trash cans with lids for the park, instead of the wire receptables typically used on New York streets. Why? Because the former type of can never overflows on the street. Bryant Park restrooms are constantly attended, creating a perception of safety.
Manshel generally believes that only a private entity could have improved the park; because a downtown park is more intensively used than one in a residential area, the downtown park needs more resources- but a city government will often find it politically infeasible to be perceived as favoring downtown, and thus is less likely than a private nonprofit to adequately support the downtown park. Moreover, government-employed planners tend to deify community engagement- but a long community engagement process reduces administrators' flexibility to make small changes.
Manshel also discusses unsuccessful attempts at placemaking; for example, Cleveland's Public Square lacks shade and movable chairs, and as a result underperforms. Additionally, the square has far less retail than Bryant Park, reducing the public's motivation to visit.
Manshel's discussion of some issues less directly related to Bryant Park is mostly adequate, but occasionally is a bit vague. His chapter on Jamaica (a neighborhood in Queens) suggests that downtown Jamaica is successful, but he doesn't supply much data to prove it. He claims that a local nonprofit ended street homelessness there by "providing the with high-quality outreach services"; it isn't clear to me what sort of services he means.