Disappearance of Haruhi Suzumiya Novel

"(W) Nagaru Tanigawa What if you woke up one morning, and everything changed? It's one week before Christmas Eve, and Haruhi and the S.O.S. Brigade are gearing up for holiday festivities. But just before the fun kicks off, Kyon, the only 'normal' member, wakes up in a weird alternate dimension, one where Haruhi attends another school entirely, Nagato the time traveling robot is just an ordinary human, and Mikuru doesn't even recognize him. In other words, S.O.S. Brigade never existed! Kyon must travel back in time to set things right in an adventure reminiscent of It's a Wonderful Life."