Released September 1, Intertwined is her first hardcover book (so far as I know) and it's young adult and it's 448 pages. It's also the start of a series!
Book description from author's site:
Most sixteen-year-olds have friends. Aden Stone has four human souls living inside him:
One can time-travel.
One can raise the dead.
One can tell the future.
And one can possess another human.
With no other family and a life spent in and out of institutions, Aden and the souls have become friends. But now, they’re causing him all kinds of trouble.
Like, he’ll blink and suddenly he’s a younger Aden, reliving the past. One wrong move, and he’ll change the future. Or, he’ll walk past a total stranger and know how and when she’s going to die.
He’s so over it. All he wants is peace.
And then he meets a girl who quiets the voices. Well, for as long as he’s with her. Why? Mary Ann Gray is his total opposite. He’s a loner; she has friends. He doesn’t care what anyone thinks; she tries to make everyone happy. And while he attracts the paranormal, she repels it. For her sake, he should stay away. But it’s too late. . .
Somehow, they share an inexplicable bond of friendship. A bond about to be tested by a werewolf shape-shifter who wants Mary Ann for his own and a vampire princess Aden can’t resist. Two romances, both forbidden. . . doomed. Still, the four will enter a dark underworld of intrigue and danger. . . but not everyone will come out alive. . .