Friendship Schools 94 Best friends 88 Pigs 38 Animals 36 Elephants 32 Middle schools 30 Fiction 28 Humorous stories 24 Conduct of life 21 Dogs 21 Family life 20 Interpersonal relations 20 Mice 20 Bears 18 English fiction 17 Cliques (Sociology) 16 Princesses 16 Adventure and adventurers 15 Cats 14 Fantasy 14 Hippopotamus 14 Parties 14 Bullies 12 Dating (Social customs) 12 Diaries 12 Gerald (Fictitious character : Willems) 12 JUVENILE FICTION / Social Issues / Friendship 12 Magic 12 Popularity 12