Title: The Disappearance of Suzumiya Haruhi
Author: Tanigawa Nagaru
What it's about: Christmas is approaching, and Suzumiya Haruhi wants to celebrate with the SOS Brigade. However, December 18th rolls around, and Kyon finds himself in a decidedly un-merry position. Nothing is as he remembers it. Haruhi and Koizumi no longer attend North High, Asahina-san has no recollection of him, and Nagato is a normal, shy bookworm. Now it's up to Kyon to figure out a way to restore the universe to how it was previously - if he even wants to.
What I thought: In contrast to The Boredom of Suzumiya Haruhi, this book is one full story, and it's a good one. It's got a mysterious feel to it, and it's pretty neat to see the SOS Brigade members in the other universe, acting how they would if Suzumiya Haruhi had never blown into their lives. Another neat thing is getting to see how Kyon's view of the SOS Brigade and its leader has changed since Haruhi first formed the club. There's also good personality development for Nagato, as well as development for the mysterious time-traveling events stemming from Tanabata three years ago.
Overall: As far as the Suzumiya Haruhi books go, this is an especially good one.