- HörbuchJane GoodallKatherine Krohn
- HörbuchMichael JacksonKatherine Krohn
- HörbuchThe Earth-Shaking Facts about Earthquakes with Max Axiom, Super ScientistKatherine Krohn
- HörbuchThe 1918 Flu PandemicKatherine Krohn
- HörbuchMadam C. J. Walker and New CosmeticsKatherine Krohn
- HörbuchThe Whirlwind World of Hurricanes with Max Axiom, Super ScientistKatherine Krohn
- HörbuchJonas Salk and the Polio VaccineKatherine Krohn