Mr. Connelly, like George P. Pelecanos ("Soul Circus"), has been pivotal in reinventing the traditional gumshoe story for streetwise settings and more socially conscious times, without losing that genre's entertainment value. Mr. Pelecanos's Washington-based Derek Strange, in particular, has become a charismatic figure in this landscape, a sharp, affectionately drawn private investigator. Strange, whose shingle reads "Strange Investigations," digs thoughtfully into each case. Mr. Pelecanos, whose work gets better and better, continues to ascribe motives more wrenching than random ugliness to perpetrators whose lives have gone wrong.