Revealers by Amanda Marrone

Jules has special abilities. By day, she and her friends seem like typical high school seniors. By night, they are Revealer witches. One by one, her friends turn eighteen and are initiated into the coven's inner circle. And one by one, they are getting completely freaked out. Jules realizes she's got to find out what's behind the shadows of her coven before it's too late to save her friends and herself. What she discovers may be too powerful for even the toughest witches to defeat.

This book is action packed and a new take on witches!