Unlicensed PI Matthew Scudder returns after a three-year absence to investigate the murder of a wealthy couple savagely slain in their Manhattan townhouse. Matt's now 62, and his age shows in this relatively sedate outing. There's less violence than in many cases past, and the urban melancholy that pervaded his earlier tales has dissipated, replaced by a mature reckoning with the unending cycle of life and death. The mystery elements are strong. To the cops, the case is open-and-shut: the perps have been found dead, murder/suicide, in Brooklyn, with loot from the townhouse in their possession. Matt enters the scene when his assistant, TJ, introduces him to the cousin of the dead couple's daughter; the cousin suspects the daughter of having engineered the killings for the inheritance. At loose ends, Matt digs in, quickly rejecting the daughter as a suspect but uncovering evidence pointing to a mastermind behind the murders. Block sounds numerous obligatory notes from Scudder tales past the AA meetings, the tithing of Matt's income, cameo appearances by Matt's love interest, Elaine, and his friend, Irish mobster Mick Ballou and he adds texture with some familial drama involving Matt's sons and ex-wife. His prose is as smooth as aged whiskey, as always, and the story flows across its pages. It lacks the visceral edge and heightened emotion of many previous Scudders, however, and the ending seems patly aimed at a sequel. This is a solid mystery, a fine Block, but less than exceptional. (Nov.)Forecast: All Blocks sell and Scudder's return will do particularly well, especially with the attendant major ad/promo, including a 17-city author tour