Hughes, Naomi

When an alien ship is destroyed above Earth, a fog is released that covers everything and turns reflective surfaces into portals that release monsters. Although there is a ban on mirrors, seventeen-year-old Marty Callahan, who suffers from OCD, becomes an illegal distributor of mirrors until he's caught. Marty is exiled along with the mayor's son Elliott to an abandoned city overrun by fog. But Marty is determined to find his brother Ty in London, so he and Elliott set aside their differences and embark on a quest that reveals the truth behind the spaceship and the danger threatening Earth.

"A horrific explosion levels part of the city and Camryn Kingfisher is the sole survivor. Amidst controversy, conspiracy theories, and threats from government officials, Camryn longs for the truth. But the only person who she can turn to is a transparent boy in a lab coat named Quint. Unsure whether he's a hallucination or a ghost, Camryn has no choice but to trust him as they become embroiled in a plot that is bigger than either of them realize. In a race where the fabric of time and space is at stake, they must figure out who caused the explosion before the culprit comes back to finish Camryn--and her city--off for good."--Dust jacket.