A flawless historical backdrop underpins Block's second novel (after 2004's The Grave of God's Daughter
) about a rookie Newark, N.J., homicide cop, Martin Emmett. Mistrusted by his superiors and unable to solve the first murder case assigned to him, Emmett has been shunted off to man the records room. On the eve of the 1960s riots, Emmett is handed a second case—a make or break opportunity. Emmett quickly gets an inkling that the murder of a healthy young black man, mutilated and dumped in a sewage tunnel, may not be an isolated killing, but hard evidence is lacking. Corrupt cops, mobsters, racists (white and black) and the riots complicate his investigation. Block's serial killer, whose exploits are described episodically, stretches credulity, as do some of her minor characters, particularly an engaging juvenile suspect who at times acts too adult for his years. Still, Block dramatically depicts the attitudes and the economic and social forces that created the tinderbox that was Newark, the match that lit the fuse and the resulting firestorm. (Nov.)