Midnighters #2: Touching Darkness (Midnighters) - Scott Westerfeld

As the Midnighters search for the truth about the secret hour, they uncover terrifying mysteries woven into the very fabric of Bixby’s history, and a conspiracy that touches the world of daylight.

This time Jessica Day is not the only Midnighter in mortal danger, and if the group can’t find a way to come together, they could lose one of their own . . . forever.