After a hiatus of more than three years, Mystery Grandmaster Lawrence Block returns to his series about Matt Scudder, a former cop with a difficult, painful past who became a private investigator. In this 16th installment, a woman whom Scudder met at an AA meeting asks him to investigate a dubious-seeming guy she met over the Internet. As Scudder pursues the case, he realizes that he's on the trail of a killer--the same killer from the previous Scudder novel, HOPE TO DIE--and that both he and his wife Elaine are potential victims.