Found by Margaret Peterson Haddix

Main Characters: (Almost) Thirteen-year-olds Jonah and Chip, and Jonah's younger sister Katherine
Location: Undefined
Time Period: Contemporary
Genre: YA Fiction, Science Fiction, Time Travel
Series: The Missing #1

A plane mysteriously appears at an airport terminal. It was not scheduled, it was not on radar, it did not land. It just appeared. When airport personnel boarded it, they found no crew. But in each of the thirty-six seats on the plane was a crying baby.

Thirteen years later, Jonah receives a letter. There is no return address, no signature, just a single sentence: "You are one of the missing."

Seriously, do you need more than that to want to read this book?

This is the first book in a new series by the author of the Shadow Children series (better known--in my library, at least--as the Among the... series) and as such has to lay a lot of groundwork for the rest of the series. But Haddix keeps the story moving along to the climactic reveal--which is so much more complex than I was expecting. As with the Shadow Children series, there is the potential to follow many different characters through various adventures and some who were minor characters in this book could become major characters later. According to her website, there will be seven books in this series, just as in the Shadow Children, and the second one, Sent, will come out in August 2009. I can hardly wait.

Found is on the 2009-2010 Texas Lone Star Reading List.