I just got sucked into this book despite the fact that the title was a bit off-putting for me (the pop song and all that is associated with it). I love the concept already. Westerfeld is one of those new voices (new to me at least) who seems to really be able to write quite different stories. I loved MIDNIGHTERS and look forward to the next book in that series. SO YESTERDAY will, I think, strike a chord with readers of all ages. I am only in the first part of the book, so I will reserve final judgment, but it hooked me immediately.