The fourth volume of The Innocents Abroad, or The New Pilgrims' Progress, a travel book by American author Mark Twain published in 1869 which humorously chronicles what Twain called his “Great Pleasure Excursion” on board the chartered vessel Quaker City (formerly USS Quaker City) through Europe and the Holy Land with a group of American travelers in 1867. It was the best-selling of Twain's works during his lifetime, as well as being one of the best-selling travel books of all time.
