The Informant by Thomas Perry

Great, I loved it, didn't want it to end. The third in Perry's The Butcher's Boy series (The Butcher's Boy, Sleeping Dogs and The Informant). The only thing I don't like about this series is that the book timeline matches the release timeline of about once every 10 years. Publishers Weekly: ...pits the Butcher's Boy (aka Michael Schaeffer), an impeccably effective hit man, against his old nemesis, Elizabeth Waring, an impeccably honest Justice Department official. Though Waring's boss, arrogant political appointee Dale Hunsecker, tries to hamstring her, Waring wants to bolster her 20-year pursuit of Mafia bosses by turning the Butcher's Boy into America's most important informant. Waring soon enters into an intricate pas de deux with a man who considers death a buy-sell commodity. Meanwhile, this icy yet strangely appealing killer, who reads Waring as well as she reads him, methodically murders capo after capo and their "made men" across the country, the only way he can safely return to his quiet retirement in England with his beloved wife, Meg. Perry offers a compelling, rapid-fire plot, credible Mafia and FBI secondary characters, an indictment of self-serving officialdom, and the old soul-shattering moral dilemma: what is truth?