“Green Book” (***1/2 out of four) was an enormously satisfying comic melodrama set in 1962 in which a crass, bigoted nightclub tough (Viggo Mortensen) was hired by a gay African-American jazz pianist (Mahershala Ali) to be his driver on a tour of the Deep South. Initially, he takes the job just for the money but over time they develop an unlikely relationship and respect for one another. Mortensen is sensational in perhaps the best performance of his career and Ali’s performance grows more complex as it goes along and both enhance a razor-sharp screenplay that is filled with period detail and unexpected humor. One of director Peter Farrelly’s (“Dumb And Dumber”, “Kingpin”) most unusual films and also one of his best.