This Isn't What It Looks Like Secret Series, Book 4.

In this fourth and second-to-last book in the series, Cass and Max-Ernest set out on separate, yet equally dangerous, adventures. Cass finds herself alone and disoriented, a stranger in a dream-like, medieval world. With the help of a long-lost relative, she begins to uncover clues and secrets-piecing together her family's history as she fights her way back to the present world. Meanwhile, back home, Cass is at the hospital in a deep coma. Max-Er...