Project Chrysalis : a book of the transfigured world
(Book)

"A generation after a global plague depletes humanity and divides the world, Jenn and Mykol are brought together by a mysterious project and uncover a secret that changes everything they think they know. On Jenn’s side of the city’s impenetrable walls: power, military discipline, and unimaginable technology. On Mykol’s: darkened streets, deteriorating infrastructure, and a tedious job prying haunted memories from the electronic devices of those long departed. When the orphan Jenn risks everything to learn about her hidden past and her father’s possible connection to the world’s collapse, she and Mykol discover a secret that binds them together while glimpsing the strange reality behind the all-powerful Thomas Gibson and his Provisional Authority. Their next desperate step is attempting to save humanity from what it has wrought." --publisher's website