Ex-undercover FBI agent Joe Pistone is best known as Donnie Brasco, while Bill Bonanno once headed the crime family Pistone infiltrated for six years. Their ''novel'' is a strange hybrid, a fictional Mob thriller punctuated with autobiographical reflections like ''for six beautiful years I didn't have to fill out a single form,'' and ''mostly the life picked us.... I lived it. I went to prison. I left it.'' Weirdly, it sorta works, deftly alternating the point of view between the Italian Mafia and the FBI circa 1985 as the Feds search for a missing Russian-languages professor tied to the brutal Russian Mob. The Good Guys reads so well, you may begin daydreaming about what coulda been had Ness and Capone become pen pals.