Question: is the jack reacher movie based on a book

Answer: Yes, Jack Reacher (formerly called One Shot, or alternatively known as Jack Reacher: One Shot) is a 2012 American action thriller film written and directed by Christopher McQuarrie, based on Lee Child's 2005 novel One Shot. The film stars Tom Cruise as the title character, with Rosamund Pike, David Oyelowo, Richard Jenkins, Jai Courtney, Werner Herzog and Robert Duvall also starring. The film entered production in October 2011, and concluded in January 2012. It was filmed entirely on location in Pittsburgh, Pennsylvania. It received mixed reviews but performed well at the box office.