Skulduggery please r kingdom of the wicked - Derek Landy

"We're the new breed of sorcerers," said Kitana,

"and we're stronger than you."

Magic is a disease. Across the land, normal people are suddenly developing wild and unstable powers. One of those is Kitana. A normal teenage girl who, along with her friends, becomes infected. Becomes powerful. Becomes corrupted. Wielding the magic of gods, they're set to tear the city apart unless someone stands up against them.

Looks like it's going to be another one of those days...