So Long, and Thanks for All the Fish (Hitchhiker's Guide Series #4)

Arthur Dent is out of his bathrobe, in love, and wondering why the dolphins said...So Long and Thanks for All the Fish. Was the earth really demolished? Why did all the dolphins disappear? What is God's final message to His creatures? Arthur Dent, Ford Prefect, and the new voivoid gang are off (by commercial airline) on a wacked-out quest to answer these truly unimportant questions.