Everything you need to understand or teach Children of Eden by Joey Graceffa.
Joey Graceffa's Children of Eden is the first of two novels about the people who live in Eden after the Earth reportedly collapsed, killing everyone and everything outside the man-made city. Citing the potential for Eden's destruction without strict rules, Eden's government allows couples to have only one child. Since Rowan was falsely declared to be the second child, she grows up hidden from view in the family's home. Her twin, Ash, lives the life of a privileged child in Eden. The main themes are sibling relationships, man's connections to nature, and government control.