Question: are all three hobbit movies in one book

Answer: No, The Hobbit is a film series consisting of three high fantasy adventure films directed by Peter Jackson. They are based on the 1937 novel The Hobbit by J.R.R. Tolkien, with large portions of the trilogy inspired by the appendices to The Return of the King, which expand on the story told in The Hobbit, as well as new material and characters written especially for the films. Together they act as a prequel to Jackson's The Lord of the Rings film trilogy. The films are subtitled An Unexpected Journey (2012), The Desolation of Smaug (2013), and The Battle of the Five Armies (2014).