Title: Literary adaptation
Content:  of many adaptations of the Brothers Grimm tale Snow White was released in 1902 while the earliest surviving copy is the 1916 version. 1903 saw the release of Alice in Wonderland directed by Cecil Hepworth and Percy Stow, the first movie adaptation of Lewis Carroll's 1865 children's book Alice's Adventures in Wonderland. The first feature-length film to be shot entirely in Hollywood was Cecil B. DeMille's first assignment, The Squaw Man, in 1914, which was the first of three movie versions (all directed by DeMille) based on Edwin Milton Royle's 1905 play of the same name. Since the early days of the genre, major films have been largely adapted: The most 
Title: Westward Ho! (novel)
Content:   In April 1925, the book was the first novel to be adapted for radio by the BBC. The first movie adaptation of the novel was a 1919 silent film, Westward Ho!, directed by Percy Nash. A 1988 children's animated film, Westward Ho!, produced by Burbank Films Australia, was loosely based on Kingsley's novel.
Title: Captain from Castile (novel)
Content:  The first half of the book was made into a successful film, Captain from Castile, in 1947.
Title: Snow White (1902 film)
Content:  Snow White is a silent movie made in 1902. It was the first time the classic 1812 Brothers Grimm fairy tale was made into a film. It was registered for United States copyright on May 1, 1903.
Title: The Common Law (1931 film)
Content:  Robert W. Chambers' 1911 novel was a best seller in the 1910s, and was called by some "as the most daring piece of writing that Chambers ever turned out". The novel had already been made into a film twice during the silent era, both with a Selznick producing. The first, in 1916, was produced by Lewis J. Selznick starred Clara Kimball Young and Conway Tearle. Lewis was the father of David O. Selznick. David's brother, Myron, would remake the film, this time in 1923, in which Tearle would again star, this time opposite Corinne Griffith. In February 1931, RKO announced it had purchased the rights to Chambers novel. Charles R. Rogers made the announcement, as well as stating that Constance Bennett would 
Title: Henry and June
Content:  The book was later filmed as Henry & June directed by Philip Kaufman, with Fred Ward as Henry, Uma Thurman as June, and Maria de Medeiros as Anaïs Nin. The movie, released in 1990, is notable as the first film to be released in the United States with an NC-17 rating. The same year the book was also adapted into a film as The Room of Words (La stanza delle parole), a low-budget Italian production directed by Franco Molé.
Title: The Hobbit
Content:  The first authorized adaptation of The Hobbit appeared in March 1953, a stage production by St. Margaret's School, Edinburgh. The Hobbit has since been adapted for other media many times. The first motion picture adaptation of The Hobbit, a 12-minute film of cartoon stills, was commissioned from Gene Deitch by William L. Snyder in 1966, as related by Deitch himself. This film was publicly screened in New York City. In 1969 (over 30 years after first publication), Tolkien sold the film and merchandising rights to The Hobbit to United Artists under an agreement stipulating a lump sum payment of £10,000 plus a 7.5% 
Title: The Hour Before the Dawn
Content:  The novel was published in 1942. Film rights were bought by Paramount while the project was in galley form, prior to Pearl Harbour. When the book was published, it became a best seller, but Paramount were reluctant to make a film based on it because it was about a conscientious objector - something that was felt to be palatable to the American public while the USA was neutral, but not after. However, after time passed, executives began to feel the public would be sympathetic to a movie about a genuine objector, as it was one of the freedoms the Allies were fighting for. The movie was the first film produced by William Dozier, who had worked as a story editor at Paramount for a number of years. Shooting started in April 1943. Because of dim-out restrictions, night scenes were shot in Phoenix, Arizona.
Title: The Lad and the Lion
Content:  The Lad and the Lion was the first by Burroughs adapted to film, as a five-reel black and white silent movie released by the Selig Polyscope Company, premiering May 14, 1917, roughly simultaneously with the print serial. The film makes Michael the son of an American millionaire rather than a European prince, dropping the parallel plot and focusing exclusively on the sea and African adventures of the lad and the lion. The film was later remade as The Lion Man (1936), an even looser adaptation with much less resemblance to the original story.
Title: Production of The Lord of the Rings film series
Content:  Tolkien's novels The Hobbit (1937) and The Lord of the Rings (1954–55), set in Middle-earth, were the subject of many early failed attempts to bring the fictional universe to life in screen. Tolkien was skeptical of the prospects of an adaptation. While animated and live-action shorts were made in 1967 and 1971, the first commercial depiction of one of his books onscreen was in an animated TV special of The Hobbit in 1977. In 1978 the first big screen adaptation of the fictional setting was introduced in Ralph Bakshi's animated The Lord of the Rings. The rights to adapt Tolkien's works passed through the hands of several studios, having been briefly leased to Rembrandt films before being sold 

Question: when was the first book made into a movie?
Answer: 1924.