This Sky Brooks bundle includes books one through four.  

Werewolves are hunting me. I was just an ordinary girl waiting tables in a small-town bar. I had no idea magic was real. That was, until I backed my car over a werewolf a couple of times. In my defense, the wolf was trying to murder me, and I was all out of mace.

Nicole Cassidy is a witch descended from the Greek gods...but she doesn't know it until she moves to a new town and discovers a dangerous world of magic and monsters that she never knew existed. When the Olympian Comet shoots through the sky for the first time in 3,000 years, Nicole and four others - including mysterious bad-boy Blake - are gifted with elemental powers. But the comet has another effect - it opens the portal to another dimension that has imprisoned the Titans for centuries.

According to legend, twin sisters Gemma and Mira are descended from witches. But they’ve never been able to use magic. On their 17th birthday, everything changes. They’re gifted with power over the elements, and right after receiving their magic, they’re tracked down and attacked by an ancient monster. They would have died, if not for Mira’s boyfriend, Ethan, showing up to save the day.

Our souls are bound together. Our powers will tear us apart. There were six of us. Caged, turned into monsters, and tormented with brutal tests of our dark powers. We had only each other to count on... until an escape attempt ended with one dead, the others recaptured, and me dragged away into a different nightmare. When I finally fight my way back, the men I set free are hardened, beastlier versions of the devoted boys I knew. They see me as a traitor and a murderer, but they refuse to let me go. Even with our former captors hunting us down, they want to make me pay.