Troubled Waters is the follow-up to Code Black and continues the tale of MBTA transit cop, Morris Fitzgerald. Morris and his protege Susan Sann embark on a well-being check of his homeless cousin in the subways of the city. However, along the way, they encounter a political system insistent on ridding the city of its homeless population through whatever means necessary.
There are (at least) two Joe Peters represented by the assortment of books that Goodreads has assigned to the name "Joe Peters." Until Goodreads gets around to sorting one Joe from the other, make the best of what you can.