I just couldn't put this one down. Two thirteen-year-old friends, Chip and Jonah are adopted. They both start receiving threatening letters saying that they are "the missing" and someone will soon be coming for them, "beware"! Through some investigation the boys learn that before they were adopted they were discovered on an abandoned plane that appeared out of nowhere. The only thing on the plane was about thirty other babies. How did the plane get there? Where did it come from? The boys realize that they have uncovered a mystery involving time travel. This is the first installment in Haddix's newest series, "The Missing". Don't miss out!