On November 22, 1963, three shots rang out in Dallas, President Kennedy died, and the world changed. What if you could change it back? Would the consequences be worth it? 11/22/63 (polish title Dallas '63) is a number-one bestseller by Stephen King about a man who travels back in time to prevent the John F. Kennedy assassination...

Jake Epping is a recently-divorced, a thirty-five-year-old high school English teacher in Lisbon Falls, Maine US, who makes extra money teaching in an adult education programme. Jake receives an essay from one of the students - janitor named Harry Dunning about Halloween night,  50 years ago - in 1958, when Harry Dunning’s father came home and killed his mother, his sister, and his brother with a hammer. Harry escaped with a smashed leg, as evidenced by his crooked walk.

Not much later, Jake’s friend Al, who runs the local diner, divulges a secret. Al shows Jake a time portal located in the back of his diner's pantry, which leads to September 9, 1958, at 11:58 a.m. Al tells him that the portal always leads to that same moment in 1958 every time, and that it is always exactly two minutes later on return to the present. He enlists Jake on an insane - and insanely possible - mission to try to prevent the Kennedy assassination. So begins Jake’s new life as George Amberson and his new world of Elvis and JFK, of big American cars and sock hops, of a troubled loner named Lee Harvey Oswald and a beautiful high school librarian named Sadie Dunhill, who becomes the love of Jake’s life - a life that transgresses all the normal rules of time.

Brilliant story about time travel and what might happen if we could go back and change the past...

11/22/63 excerpt:

"On Monday, March 25, Lee came walking up Neely Street carrying a long package wrapped in brown paper. Peering through a tiny crack in the curtains, I could see the words REGISTERED and INSURED stamped on it in big red letters. For the first time I thought he seemed furtive and nervous, actually looking around at his exterior surroundings instead of at the spooky furniture deep in his head. I knew what was in the package: a 6.5mm Carcano rifle - also known as a Mannlicher-Carcano - complete with scope, purchased from Klein’s Sporting Goods in Chicago. Five minutes after he climbed the outside stairs to the second floor, the gun Lee would use to change history was in a closet above my head. Marina took the famous pictures of him holding it just outside my living room window six days later, but I didn’t see it. That was a Sunday, and I was in Jodie. As the tenth grew closer, those weekends with Sadie had become the most important, the dearest, things in my life."