Ship of Fools by Katherine Anne Porter; 1962/1984. Softcover.

The story takes place in the summer of 1931, on board a cruise ship bound for Germany. Passengers include a Spanish noblewoman, a drunken German lawyer, an American divorcee, a pair of Mexican Catholic priests. This ship of fools is a crucible of intense experience, out of which everyone emerges forever changed. Rich in incident, passion, and treachery, the novel explores themes of nationalism, cultural and ethnic pride, and basic human frailty.