Four CD set. Halloween 73! Two complete shows recorded at the Auditorium Theater in Chicago 10/31/73 featuring a classic Zappa band line-up along with liner notes by Ruth Underwood & Ralph Humphrey, who played in the shows, and pictures of the event from The Vault! The Box Set includes four discs total - the 4th disc features rehearsals recorded right before the tour started - and a 40 page booklet. Plus mask + special Zappa gloves! Happy Halloween! Don't take candy from strangers!