Possession was a weird book. It was full of action, of tech, of mystery and bad guys and I must admit I was pretty confused till I finished the first half of the book. 
 Even then, it wasn't a piece of cake - the story was really fast-paced and the several technological devices and supernatural powers didn't help me understand the world. In fact, there were several plot holes and unanswered question (one of the reasons why I'm hoping for a sequel), so the book itself wasn't outstanding. 
 That said, the ending and the love story were so powerful that in my decision of the rating I couldn't help but being influenced by them. The relationship Vi and Jag had, the way they understood and helped each other, how they were ready the give up their life for one another - it was one of the sweetest and strongest love stories I've ever read. 
 The end, even though predictable, still managed to surprise me, and the last pages were so hard to read I almost wanted to put the book my kindle down. Though painful, it was a beautiful ending, one that left the future of the main character in the hands of the readers - or, as I hope, in the author's ones: I still think there were too many holes in the book, so I would welcome a sequel, especially if a certain person would finally get her/his memory back.