Thank you to the publisher for providing this book in exchange for an honest review. This did not influence my review in any way. 
 I know we're only a month in, but I have no trouble calling it - this is one of the best books of 2015. 
 Imagine your soul could be traced and you could find out who had it before you did. What would you do with that information, the information that you were once better or worse than you are now? Would you let it haunt you, take over your life? Alina Chase had no choice in the matter. Her soul belonged to a criminal considered so dangerous that when she died, all babies born were tested to see which one had her soul and the results were made public. For her own protection, Alina was contained on an island, always living in the shadow of the person she might turn out to be. When she manages to escape from her prison, her past self sets her on a path to uncover secrets to her past life which will change her own future. 
 From the very start, from chapter one, I absolutely loved it. It is exciting from the very beginning - it had my heart pumping and I don't think it stopped until after I turned the last page. There are parts where it may seem a little slow but it doesn't settle down (I think this is an important distinction) from the moment the escape starts to develop, as we learn what put Alina in her prison and how her life was not her own, how she was now paying for someone else's crimes. We learn the motives of her co-conspirators and what they're hoping to gain from her escape. I was invested the whole way through. Alina is determined and brave, and I couldn't help but admire her and how she reacted in her rapidly changing situation. 
 The characters are extraordinarily well developed and complex. There were few of them that we really see, which meant there was enough time to really get to know each one. Soulprint is a standalone (rare in the YA trend of sometimes crazy long series!) so you don't have multiple books to develop a multitude of characters. I loved the slow burn of the romance, another rare thing in YA, and it seemed as if I could really feel it developing, I could understand it. And the budding romance between Alina and Cameron, one of her rescuers, isn't the only interesting relationship dynamic because you also have Cameron's sister, Casey, a talented hacker. The familial relationship between her and Cameron is beautifully done and I loved the suspicion she had of Alina - is that a weird thing to say? Casey is very protective of her brother and this is portrayed in a fantastic way. The wary friendship she forms with Alina is shaken by Alina's feelings for Cameron, which happens despite Casey's protests and insistence that now is not the time. It felt realistic. And me? I love realistic, alongside all the secrets and tantalizing mystery. 
 And you know what else is great? The author has a degree in Biology! That really stands out for me as you can tell the soulprint, while less is known about it, is based on DNA and its written by someone who really knows what they're talking about. 
 I could have easily read more books about this futuristic world, about the struggle that comes with knowing who you used to be, about the characters and where they went next. But I guess I'm okay with this being a standalone too - a story I can come back to again and again, which I anticipate I will do in the future.