The Book of Shadows

What happens when you and your girlfriend uncover a mysterious book and then accidentally activate it? That is what happened to Alex and Talia, and now Alex finds himself in the mysterious world of Esteron with the book, while Talia is possessed by something! In addition, others have detected the activation of the book, and want it for their own nefarious purposes. Can you keep Alex one step ahead of those who want the book while at the same time figure out where am I? What does this book do? Why do these other people want it?