Family 2 Friendship Letters 2 Social Themes Crises économiques 1 Depressions 1 Dust Bowl Era, 1931-1939 1 more ... Emotions & Feelings 1 Fate and fatalism 1 Fathers 1 Female friendship 1 Great Depression, 1929-1939 1 Historical 1 Identity 1 Identity (Psychology) in adolescence 1 Interplanetary voyages 1 JUVENILE FICTION 1 Lettres (Genre littéraire) 1 Newbery Medal 1 Parents 1 Pères 1 Roman pour jeunes adultes 1 Secrecy 1 Secret 1 Secrets 1 Souvenirs (Keepsakes) 1 Souvenirs (Objets) 1 Teenage girls 1 Time Travel 1 Voyages 1 less ...