DOUGLAS ADAMS IS A TERRIFIC SATIRIST.'-The Washington Post Book WorldFacing annihilation at the hands of the warlike Vogons is a curious time to have a craving for tea. It could only happen to the cosmically displaced Arthur Dent and his curious comrades in arms as they hurtle across space powered by pure improbability-and desperately in search of a place to eat. Among Arthur's motley shipmates are Ford Prefect, a longtime friend and expert contributor to the Hitchhiker's Guide to the Galaxy;