Mark of Stars by Tessa Hale

All Rowan wanted was a normal senior year. To fade into the background of her classmates. Instead, her entire world has been turned upside down. Words she never thought she would utter are now a part of her everyday life. Shifters. Powers. Bonds.
Comfort comes from the five fated mates who would do anything to protect her. Their connections are deepening, yet Rowan isn’t convinced all of them want her. Holden has secrets. Vaughn comes to her rescue in one breath and cuts her to the core with the next. But Anson, Lucas, and Keene will do anything to make their bond work and to convince Rowan that she’s all they’ve ever wanted.
They’re all trying, but each new development leaves Rowan reeling. As they realize just what kind of gift Rowan has, they discover it’s impossible to know who to trust.
Because there are those who lurk in the shadows, forces that want the power Rowan has humming beneath her skin. And they will stop at nothing to get it…