I really liked this book, and I love the depth that A.J. Paquette put into it. This book was so hard to put down that I read it in one and a half days.It was scary, surprising, and fast-paced. Ana, the main character, is smart, intelligent, and brave. Todd, her boyfriend from earth, is friendly, kind, and takes risks. I liked all the characters, but my favorite is Ana. I would recommend this book to ages 11 and up because of some bad words and bloodshed. A.J. Paquette made such a good book that I hope that she will write a book two.