Friendship 125 History 101 Magic 92 Families 69 Brothers and sisters 58 Schools 56 Best friends 39 Dogs 38 Survival 38 Secrecy 36 World War, 1939-1945 32 Identity (Psychology) 31 Animals 27 African Americans 25 Dragons 25 Interpersonal relations 25 Middle schools 25 Sisters 24 Fathers and daughters 23 Brothers 20 Good and evil 19 Human-animal relationships 19 Mothers and daughters 18 Quests (Expeditions) 18 Family life 17 Twins 17 Monsters 16 Murder 16 Orphans 15 Bullying 13