The book centers around identical twins Ruby and Garnet who, despite their similar appearances, have contrasting personalities. Ruby is outgoing and assertive, while Garnet is shy and reserved. After the death of their mother, the girls' lives are upended when their father starts a new relationship, leading to a move that separates the twins from everything familiar. As they navigate this transition, the story explores themes of individuality, the bond of sisterhood, and the challenges of adapting to change. The twins must learn to embrace their differences and find their own paths, even as they struggle to maintain their close connection amidst the upheaval in their lives.

The 7021st greatest book of all time