i really enjoyed reading this book. I think the author could have just left it the way it is, but i see on good reads that there might be a second book. 
 Anna is a young girl living with her dad in the middle of nowhere, through her explorations, she finds that there are 4 boys living in separate cells under her house and her dad is monitoring them for his work. She slowly forms friendships with the boys and gets to know them. Cas the funny one, Trev the deep thinker, Nick the grumpy one and Sam, the most intriguing one of all. Anna likes Sam the best, kind of even has abit of a crush on him. Eventually she gets to help her dad in the lab, taking blood and testing the boys. Then one day Connor arrives and then all hell breaks loose. 
 I thought this would be abit more sci-fi like because these boys have been "altered" but it actually has the sort of alias type feel to it.