This was an incredibly technical and quantified analysis of the spatial geography of mass incarceration in the U.S., focusing specifically on Massachusetts but with implications for the whole country. Simes does an incredibly thorough and detailed analysis of incarceration, arrest, and conviction rates across the whole state of Massachusetts, and makes numerous critical insights that are of direct relevance to anyone who cares about PIC abolition. She shows very effectively that though much of the "law and order" and much of the "progressive reform/radical abolitionist" focus is on big cities, mid-sized/small cities show very high rates of incarceration as well - sometimes even higher than that of the big cities that get all of the focus (good and bad).
Simes uses this information to inform a broader analysis of mass incarceration, as not just a system that targets urban residents but as a broader system of state produced inequality that is then used to justify state control and surveillance. This means that the legal system necessarily produces racial inequality in incarceration. Incarceration is downstream of policing, and policing is a fundamentally *spatial* form of state intervention in life, and *space* is fundamentally racially segregated across the country. She even effectively utilizes public health framings of "excess mortality" to construct a framework of "excess incarceration", demonstrating how Black communities in Massachusetts are disproportionally punished at rates that defy logic, defy reality of actual measures of crimes committed (by comparing to baseline data the precedes the current socio-legal regime). The social and economic disruption that this incarceration produces is a fundamental component of maintaining and exacerbating this segregation, because of how it disrupts households, communities, and neighborhoods.
Unfortunately this book is really technical and scientific at times, which I appreciate for its precision but limits its broader readability. But the message embedded here, of how we should be thinking about mass incarceration as not simply a byproduct *of* segregation but something that is fundamentally in dialectic *with* segregation, is one that is very insightful and useful for those seeking to change the nature of the beast.