Short answers, pulled from the story.
Adventures of Huckleberry Finn was published on the 18th of February 1885, in the United States. The book had been released earlier in Canada and the United Kingdom on the 10th of December 1884.
Paul Needham supervised the authentication of this handwritten document for Sotheby's books and manuscripts department in New York in 1991. He verified the manuscript that Mark Twain composed between 1876 and 1883.
Several libraries banned Adventures of Huckleberry Finn because they considered it very coarse type containing bad word choice and obscenity. The Concord Public Library committee excluded the book stating it contained little humor while other critics found the language inappropriate for children.
The missing first half of the manuscript turned up in a steamer trunk owned by descendants of James Fraser Gluck in 1991. The Buffalo Public Library successfully claimed possession and opened the Mark Twain Room to showcase the treasure in 1994.
A 1939 version by MGM directed by Richard Thorpe starred Mickey Rooney as Huck. This production followed earlier silent films and preceded later adaptations such as the 1975 ABC movie featuring Ron Howard.