00:30Book of the WeekFinishing the HatEpisode 4BBC Radio 4 Duration: 15 minutes Fri 24th Dec 2010, 00:30 on BBC Radio 4 LWTo mark his 80th birthday, Stephen Sondheim appraises his long career. Show more GenresFactualArts, Culture & the MediaMusicEasy Listening, Soundtracks & MusicalsBrandBook of the WeekSeriesBook of the Week: Finishing the Hat Source: BBC Online