This book was made available to me via NetGalley for the purpose of a blog tour. 
 So. To preface this review...I am a scientist. Have been a scientist for 20 years, now. This book is a Christian speculative fic/Sci-fi YA novel. It is written for an audience that reads Christian fiction. It is probably the most anti-science novel I have read, though I do not read much Christian fiction these days. 
 The main character, Thalli, is a genetically-engineered roughly 18 y/o female who is the musician of her clone group. Thalli is an anomaly because she has feelings. The Scientists who oversee the underground facility where this civilization exists have expressly designed the clones to lack emotion. 
 Throughout life Thalli has seen her fellow podmates annihilated for being anomalies. And, still she is unable to hide her emotions, particularly when she plays music. Playing a piece of sacred music written before the nuclear war that destroyed the surface world, Thalli breaks down crying and is collected for annihilation. Just when she is going to die, she is spared by the intervention of her long-time friend, and aspiring Scientist, Berk. See, the big thing is there's not a lot of air and resources underground, so any reason to eliminate a person is, well, lets just say that a major theme in this story is how the Scientists are calculated, emotionless killers with no moral compass. 
 While awaiting her destruction, Thalli is a labrat, subject to the neural experiments of Berk and his colleagues. She meets John, an elderly, natural-born human who is the father of one of the Scientists. John is a devout Christian and shares his love of the Designer (God) with those who are slated for annihilation. He discusses emotions, and love, and prayer and other foreign concepts with Thalli, and eventually with Berk, both of whom begin to accept some level of faith in the Designer. 
 Thalli thinks she is going to go live on the surface, as part of the neural manipulations, but Berk conspires to keep Thalli with him, sure that the surface world is still toxic. They develop an affectionate bond, though Thalli endeavors to nip this, saving Berk from problems with the Scientists. 
 We learn that Thalli has been thoroughly manipulated. She was never out of harms way, and Berk loses his cool. He comes up with some really far-fetched plan to use Thalli and her friend Rhen to enter a computer simulation that would--somehow--result in solving the oxygen problem. 
 This all goes better than expected, and the Scientists are happy, but Thalli, Rhen and Berk are sentenced to annihilation. Then, because there wasn't enough God in the story, we have a Deus ex machina ending. 
 As a novel, the word choice is elementary--key to demonstrating Thalli's innocence and naivete--and it is well-edited. From a critical eye, the storyline is hard to digest and lacks plausibility. But, as a good deal of it is rote Christian dogma, it seems as though it was designed to be accepted on faith. The terminology used throughout supports the Intelligent Design verbiage, with extensive scripture revelation and Designer appellation for God. With the exception of Berk, the Scientists are amoral, lying, manipulative villains. It's rather hard for a compassionate scientist (like myself) to really recommend this book--I feel like we already get enough bad press--but fans of Christian fiction will probably enjoy it.