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Bethany Frenette
"Audrey, the sixteen-year-old daughter of a superhero, must access powers she never knew she had to defend Minneapolis from terrifying demons that have emerged from Beneath"--

by Kai Meyer (2008)
In a place similar to the 1706 Caribbean, two fourteen-year-old "polliwogs"--humans who can walk on water--rely on a mysterious figure known as the Ghost Trader and a band of pirates to help them escape from the evil that is chasing them.
Bethany Frenette
"Audrey, the sixteen-year-old daughter of a superhero, must access powers she never knew she had to defend Minneapolis from terrifying demons that have emerged from Beneath"--
Marcus Sedgwick
With the help of his servant and an orphan girl, a magician named Valerian searches graveyards, churches, and underground waterways for a book he hopes will save him from a pact he has made with evil.
Corrine Jackson
Ever since Remy O'Malley discovered her dual identity, she's kept alive by staying one step ahead of both sides in this centuries old war. Now someone's trying to draw her out of hiding, using her kidnapped father as bait. To save him, Remy will need every friend's she's got.
Emily Rodda
The walled city of Weld is under attack from ferocious flying creatures that raid in the night, bringing death and destruction. The Warden calls for Volunteers to find and destroy the Enemy who is sending the invaders. The heroes of Weld answer the call one by one, never to return. Rye is officially too young to go, but his brothers are among the lost, and he must find them.