Sisterhood and death.
Reviving the dead can never be good, and this book's opening chapters have some ominous environs, like rooms full of tanks full of bodies. The feeling of the writing and our young narrator are very YA, so I expect it's all about a teens experience of the world--in this case, a dark dystopia of a world. I'm definitely curious as to the "true cost" of this whole revival from death scenario!