Lock and Key (novel)
After her drug and alcohol addicted mother abandons her, child services forces 17-year-old Ruby Cooper to move in with her sister, Cora, who had left for college when Ruby was young. Ruby is upset about this arrangement and continues to wear the key to her old home on a chain around her neck. After learning she will be transferring to a new high school, Ruby attempts to run away but is found out. Nate Cross, Jamie and Cora's next-door neighbor, covers for her. Over the span of the story, Ruby slowly becomes closer to Nate.
The Darkest Minds
Ruby Daly celebrates her tenth birthday with her family, where her father gives her a keychain. Seeing her parents' concern about the disease, Ruby goes to comfort her parents in the night, touching their hands, and inadvertently erasing all their memories with Ruby. In the morning, her mother locks Ruby in the garage; having no recollection of her, she sends Ruby to an internment camp, where Ruby is determined to be an Orange, the most dangerous class where they have the abilities to control other people's minds and memories. Ruby uses her abilities to convince her supervisor that she is a Green, the least dangerous one with extremely high intelligence.