11/22/63 by Stephen King is a gripping alternative history mystery that combines time travel and the assassination of John F. Kennedy. The protagonist, Jake Epping, discovers a portal that leads him back to 1958, and he decides to prevent the Kennedy assassination. However, as he delves deeper into the past, he realizes that changing history has unforeseen consequences. This book is a thrilling blend of historical events, suspense, and mystery, keeping readers on the edge of their seats until the very end.