Terra Terrestrials:

Back cover: "In the distant wake of a plague that has decimated the earth's population, humanity is split in two. The rich and powerful live in skycities that float overhead, while those who remain on the ground have gathered in settlements strewn across a dying planet. Eighteen-year-old Terra Rhodon makes her living as a scav, scouring the earth for discarded scraps and metals to recycle for profit. While on a routine scavenging run, she discovers something that shocks her home settlement of Genesis X-16. Terra suddenly finds herself asking questions no one will answer. Fueled by curiosity, her search for the truth ultimately leads her to Adam--a beguiling boy with a secret that has the power to change humanity's existence forever."