Westerfeld, Scott. Midnighters #v. 3

The five teenage Midnighters of Bixby, Oklahoma, thought they understood the secret midnight hour-until one morning when time freezes in the middle of the day. The noise of school stops. Cheerleaders are frozen in midair. Everything is the haunted blue color of the midnight hour. As the Midnighters scramble for answers, they discover that the walls between the secret hour and real time are crumbling. Soon the dark creatures will break through to feed at last... unless these five teenagers can find a way to stop them

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